Beneath the city of Lourdes, France is a massive, concrete church.

One of England's most famous churches hides a pair of little known architectural treasures.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

Flamboyant architecture from the turn of 20th century.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Venice's island of the dead.

Go inside to really appreciate this 500-year-old technological masterpiece.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A taste of the macabre Tokyo's ritzy shopping district.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

This massive blockhead sculpture hides an entire library.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The quintessential Japanese rock garden has existed for more than 500 years.

The 10,000 Torii shrine.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.