World's largest cave was only discovered in 1991, and now offers tours to the public.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

The history of funerals and funerary customs.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

This relatively recently abandoned brewery is a tragic reminder of the continuing effects of Hurricane Katrina.

A Nesting Doll of Churches.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

The Pope’s secret escape route.

Architectureal fantasy quarter of Rome.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

A fake Transylvanian castle houses a cathedral of antlers.

The largest fountain in Bratislava.

A relic of the Cold War tucked away in the forested hills above Bratislava.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

The final resting place for the remains of 143 Habsburg royalty.

A unique showroom for bathroom fixtures featuring a giant toilet observation deck.

After years of being casually peed on by humans, this tree is peeing back.