Featuring 20 ramps intertwined over five levels and connecting three major expressways, the Huangjuewan Overpass in Chongqing is considered to be the world’s most complicated overpass.

When the first photos of Huangjuewan Overpass first hit the internet, a few years back, they cause a mix of shock, amazement and concern, especially among motorists. Many were wondering how on Earth less-experienced drivers were supposed to find their way with so many ramps and lanes to choose from. And, even if you consider yourself an experienced driver, Huangjuewan does look a little daunting, at least at first sight. Despite its designers’ claims that it looks much more complicated than it truly is, Huangjuewan has become known as the world’s most complicated overpass.

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The Quwwat-ul-Islam Mosque complex in New Delhi is home to an ancient wonder of metal work – a 1,600-year-old iron pillar that is exceptionally resistant to rust.

The Iron Pillar of Qutub Minar, as this ancient monument is sometimes referred to, measures 7.21-meters-tall, has a diameter of 41 centimeters and weighs about 6 tons. It’s also more than a millennium and a half old, believed to have been erected during the reign of Chandragupta II, one of the most powerful emperors of the Gupta Empire. And even though it has spent all that time outdoors, the Pillar of Qutub Minar shows almost no sign of rust damage. For decades, scientists and metal workers from all over the world speculated about the properties of this unusual marvel, and it wasn’t until 2003 that the mystery was finally cracked.

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Bera, a small town in the Indian state of Rajasthan is famous for being the only place on Earth where humans and leopards live in perfect harmony.

India is one of the most densely-populated countries on Earth, and as humanity continues to encroach on the still-uninhabited woodlands and mountains, conflicts between leopards and humans are inevitable. In fact, with human expansion at peak levels and the number of leopards higher than they’ve been in decades, tensions between the two species are growing. But there’s one place where humans and leopards have allegedly been living in peace and harmony for at least a century. Known as “leopard country”, the town of Bera is said to contain the highest concentration of leopards on the planet.

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Deep in the Tengger Desert of Inner Mongolia, surrounded by sand dunes as far as the eye can see, lies the world’s loneliest post office, a surprisingly bustling outpost of human connection.

Measuring only 15 square meters, the wooden post office of Tengger Desert is not much to look at, but that’s ok, it doesn’t get too many visitors anyway. Besides, after being abandoned for over 35 years, it actually doesn’t look half bad. Thanks to the efforts of a few intrepid individuals who learned about the existence of an old abandoned desert post office by mistake, it has been given a new lease on life, and thanks to the magic of the internet, it has actually become quite a busy operation.

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Strange Slope is a natural tourist attraction in China’s Liaoning Province, where a strange phenomenon causes things to roll uphill and prevents them from rolling downhill.

Located at the foot of Maoshan Mountain, near the city of Shenyang, the Strange Slope scenic area is considered one of the eight natural wonders of Liaoning Province. It was discovered in 1990, when, local stories say, a police officer stopped his car in the area and, taking his foot off the brake, noticed his vehicle slowly rolled uphill, all the way to the top. Word of the bizarre phenomenon spread like wildfire, and before long, people from all over the country, and even from abroad, were coming to see the gravity-defying slope in person. Authorities cleaned the place up, created separate lanes for bikes and cars, and Strange Slope became one of the most popular scenic areas in Liaoning.

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Kjeragbolten is one of the most instagrammable places in Norway. It’s an ancient boulder wedged in a crevasse by the edge of Kjerag mountain, in Lysefjord.

Unless you’ve been living under a rock, you’ve probably seen photos of people standing on this giant boulder wedged in-between two stone walls, above this seemingly bottomless abyss. Well, technically, the abyss is 984 meters or 3,228 feet deep, so in terms of chances of survival in case of a fall, it might as well be bottomless. However, despite its dramatic appearance, Kjeragbolten is relatively easy to access on foot without any special equipment, making it one of the hottest tourist spots in Norway.

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Chateau Erken, in the Russian Federation’s Kabardino-Balkaria autonomous republic, looks like an extremely well-preserved medieval castle, but in reality, this architectural wonder is just over a decade old.

Located in the vineyard-dominated countryside of Kabardino-Balkaria, Chateau Erken is a tourist attraction unlike any other in Russia. Not only does it mimic the fortress-like design of European medieval castles, but its location in the middle of a man-made lake full of fish and wild birds is just as impressive. People from all over the country come to this rural area in Southern Russia to see Chateau Erken in person. Photos and videos of this amazing castle have been doing the rounds on social media for years, but some people still can’t believe it exists and that it was built not by a king, but by a legendary businessman.

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The famous Trembling Rock of Huelgoat forest, in northeastern France, is a 7-meter-long, 137-tonne block of granite that anyone can move with their own hands, as long as they know how to push it.

The forest of Huelgoat is home to numerous large boulders and geological wonders, but Trembling Rock is by far the most popular of them all. The oblong boulder is so large and heavy that no human could ever hope to move it by themselves, and yet anyone, regardless of how skinny or weak they are, can gently rock it up and down just by pushing on the right spot. Left perched atop a much wider rock base in a unique position, Trembling Rock can make even the most feeble person on Earth look like the strongest person in the world.

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Imagine a place where you can enjoy your favorite cup of coffee in the company of dozens of koi fish as they swim through ankle-deep water that covers the entire floor. That’s Thailand’s koi fish café in a nutshell.

Remember Amix Coffee, the “flooded café” of Ho Chi Minh City, where hundreds of decorative fish of all shapes and sizes lived on the water-covered floor as patrons walked among them? It drew a lot of criticism from animal rights activists and closed down after just a couple of months, but if you liked the concept, you’ll be happy to know there’s another flooded café you can visit. Sweet Fishs Café is a unique venue in the Thai city of Khanom, where people can walk through ankle-deep water populated with dozens of koi fish.

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If you’ve ever wanted to see a dolphin up-close in its natural habitat, and, if you’re lucky, even hand feed it a tasty treat, there’s no place to do it at than Monkey Mia, the only beach in Australia that dolphins visit every day.

The wild dolphins of Monkey Mia, on the coast of Western Australia, started getting used to people in the early 1960s, when local fishermen started throwing them fish. It didn’t take long for rumors of friendly bottlenose dolphins hanging around Monkey Mia to spread, and before long the popularity of the resort reached new all-time highs. However, by the 1980s, marine researchers noticed a disturbing trend – as adult dolphins became more dependent on humans for food, their calves’ mortality rate grew. Things got so bad that, according to some experts, 90 percent of the calves failed to reach adulthood. Luckily, conservation authorities started regulating dolphin feeding.

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Carved into a vertical rockface in the Monte Cristallo massif, in Italy’s Dolomites Mountains, this incredible shelter sits at 2,700 meters (8,858 feet) above sea level.

Mountain climbers brave enough to take on the Via Ferrata Ivano Dibona in the Italian Dolomites are treated to many memorable sights, including that of a unique structure embedded in the side of a vertical rockface. The iconic location, known as Buffa di Perrero, is believed to be a shelter built by Italian soldiers during World War I. It features brick walls, a slanted roof, two doorways, and four windows framed in wood. It’s hard to believe, but someone had to carry all those building materials up the side of the mountain, as there is no backdoor to an easier access route.

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Kongthong, a remote village tucked away in the hills of India’s Meghalaya state, has a unique, centuries-old tradition where every inhabitant is given both a regular name and a song at birth, both of which become their identity.

Kongthong was recently nominated as India’s no. 1 recommendation for the United Nations World Tourism Organization’s ‘Best Tourism Villages‘ contest, both for its natural beauty and hospitable dwellers, and its unique naming tradition. The 650-or-so people who call Kongthong home, have a normal name that they use for official purposes, as well as unique tunes composed for them by their parents at birth. These songs are made especially for them, are used as their bearers’ names throughout their life, and die with them when their time comes. Because everyone in Kongthong uses their song name locally, the beautiful community has become known as India’s Whistling Village.

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Located off the coast of Croatia, in the Adriatic Sea, Baljenac is a tiny island covered by a series of dry-stone walls that make it look like a giant fingerprint when seen from above.

The oval-shaped island of Baljenac is covered by a 23-kilometer-long network of dry-stone walls. you’d think it was an ancient labyrinth, if not for the fact that the walls are only about waist high and designed solely to make agriculture easier in an inhospitable place. The rocky terrain and strong winds aren’t exactly ideal for plant cultivation, so the inhabitants of the nearby island of Kaprije built these stone walls to separate their crops and offer them some protection. It’s a technique used in other parts of Europe, like England or Ireland, but nowhere else do these walls imitate the pattern of a human fingerprint as they do on Baljenac Island.

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The picturesque Ohau Waterfall on New Zealand’s Kaikoura coast is the only waterfall in the world that doubles as a seal creche, a place where the young marine mammals can play and socialize without having to worry about predators.

Ohau is a 15-meter-high horsetail waterfall (the water maintains contact with the bedrock as it falls). It’s not the most eye-catching waterfall in the world, but it has something that no other land waterfall has – adorable seals. For one to three months a year, the shallow pool at the bottom of Ohau waterfall acts as a creche for dozens of New Zealand fur seal pups. By playing and interacting with each other, the young seals learn important behaviors and develop social skills, all while putting on an unforgettable spectacle for human visitors.

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Perched on the ridge of the Don Sheldon Amphitheater of Denali’s breathtaking Ruth Glacier, in Alaska, and reachable only by air, Sheldon Chalet is famous as the world’s most remote hotel.

Alaska’s Denali National Park stretches six million acres and is a shelter for grizzly bears, caribou, moose, wolves and other wildlife. It’s one of the most beautiful places you can visit in the United States, but also one of the most inaccessible. For example, the Don Sheldon Amphitheater, a glacial valley situated at an elevation of 6,000 feet (1,829 meters), was once only accessible by ski-equipped plane, but after the completion of the luxurious Sheldon Chalet, private helicopter rides also became an option.

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