The world's longest known cave system.

A 70-foot replica of the famed Eiffel Tower.

This replica of the Greek structure is in the heart of Nashville.

Fuel your honky-tonking with this venue's unbeatable “Recession Special.”

Flaunt your karaoke chops at this pitch-perfect dive bar.

In 1912, a broken section of the reservoir wall released millions of gallons of water and destroyed many homes downhill.

For decades these polar bears have roamed all around a Nashville neighborhood.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

For centuries young Thai men used this Giant Swing as a slingshot to heaven.

The oldest monument in Marrakesh and the city's only surviving example of Almoravid architecture.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The history and future of cannabis.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

A grand entrance to one of the world's smallest Chinatowns.

Once home to an aristocratic family and a workers' organization, this intricately tiled building now houses a chain restaurant.

On a cornerstone of the City Museum is the head of a monstrous serpent stolen from an Aztec pyramid 400 years ago.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.