Explore 10 acres of environmental sculptures.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Bioluminescent firefly squid light up this Japanese fishing port.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

The world's longest known cave system.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

This strange seaside tower got its name from a wealthy eccentric who would hide coins among its stones.

A museum of carnival attractions where you are invited to ride the rides.

Stalactites and stalagmites in a beautifully lit cave.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The beautiful baroque library of the Hapsburg empire.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

Become a prohibition rebel.

Private collection of art inspired by cabinets of curiosity.

A surreal museum of extraordinary industrial objects.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.