A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This historic train station has been converted to a locomotive themed hotel.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

A magically clear, blue river that seems to spring from nowhere.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

Turkish adventurer antiques in the heart of the Grand Bazaar.

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

Medicinal spa created with the discharge from a geothermal energy plant.

Climb right into the heart of this colorful Iceland volcano.

Crammed inside this grounded passenger plane is a bar that was once a Communist hang out and is now a ratty relic.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

The highest bridge in America was built for an almost unnervingly small amount of money.

New Zealand's epic shrine to all things puzzling.

A Spanish-style estate that has traded black ties for rock concerts.

Part bookstore, part café, and part forest.

Three legendary, living albino buffalo roaming their pastures for all to see.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Stunning examples of Russia's 18th-century wooden architecture.

San Francisco's newly reopened hands-on science museum.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.