An Austrian house of bones filled with hundreds of intricately painted skulls.

Each year melting snow turns these Austrian hiking trails into scuba zones.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This massive library holds what was once the largest book collection in the world.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A larger-than-life house of cards stands outside the house of a former fashion designer.

In the 1940s, Italian architect Mario Cavallè built a dozen of these round homes in northern Milan.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

Saint Joseph was said to heal the deaf and blind, but it was a much smaller miracle that got him canonized.

Catalonia Tradition: Beating the hollow Christmas log until it defecates in your fireplace.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

Poland's oldest salt mine has nearly everything one needs to live underground forever.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

An overlooked collection of over 350,000 artistic works created by psychiatric patients using art therapy.

These termites have an large and deadly abode—impressive by day, dazzling by night.

The crypts are so large they're basically their own underground church.

You feel like you're in a forest, but you're actually walking amidst the branches and trunks of a single giant tree.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

Crumbling remnant of Rio's colonial past tucked behind Corcovado mountain in the neighborhood of Cosme Velho.

This stunning Brazilian library contains the largest collection of Portuguese texts outside of Portugal itself.

130 replicas of world wonders squeezed into just 118 acres of space.