Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Towering basalt columns, a creation of fire and ice.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A fitting attraction for the corn capital of the world.

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

Wisconsin's most celebrated export gets the royal treatment on I-94.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

The only substantial part of Nazi Germany's formidable defensive line through Northern Italy that survives today, largely intact.

Five candy-colored villages on the Italian Riviera.

The glowing blue Nymphaeum of Emperor Tiberius.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This former luxury resort in Kaua'i is now an abandoned relic.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This missionary's legacy looms large over the Upper Peninsula of Michigan—literally.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."