This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

An underwater road considered a possible Atlantis location.

The world’s largest underwater sculpture is found just off the coast of Nassau.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

This $62 million dollar temple was erected to house one little dental fragment of religious history.

Singapore's landscaping project is home to 18 incredible Supertrees.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Notorious artist squat renovated into legal studios.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Feed it cash, get your very own gold bar.

A unique configuration of blown glass can be found inside this hotel lobby.

This living legend of maritime history is enjoying a second life.

The world's largest frame offers spectacular views of the city's past and present.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Over the dunes of the Empty Quarter, the mysterious music of the desert.

This futuristic building is yet another architectural wonder in Dubai.

Whitewashed mosque contains the world's largest carpet.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This indoor ski resort has a mountain contained inside a mall.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

A curious cave church carved into the face of a cliff.