This human-made pond is part of a Korean palace complex first built in the 7th century.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

A cake-themed art installation tucked away in historic Chinatown.

This brothel-turned-restaurant features plenty of surprises and elaborate, extravagant architecture.

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

This was the second largest mercury mine in the world and one of the oldest preserved mine complexes in Europe.

A giant bird sits atop a tower at one of the largest shopping centers in Brazil.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

Underneath downtown Lincoln resides a network of caves that was also the city's first brewery.

According to a local legend, this old castle could only be built after a woman was immured in the walls.

Accessible only by boat, this centuries-old island fort never saw troops or combat.

This tiny stone in a children's park is what remains of an ancient, once-worshipped object.

A charming, homemade vending machine dispenses burgers and sandwiches at this hole-in-the-wall bakery.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

Hidden up a dusty track off the Georgian Military Road is this fascinating waterfall with mountainous views.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

Walrus skulls and narwhal bones were found here while excavating a 900-year old church.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This castle constructed in 1928 was crafted from drawings of Lismore Castle in Ireland.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

The roof of one of the world’s largest spice markets provides a grand view over the neighborhood's glorious bustle.

Home to the longest wooden escalators in the world.

Passengers are not allowed to set foot outside this station, but you can still enjoy spectacular views of the sea from the platform.

This Roman arena once played host to bloody gladiatorial battles.