Curious cave that stays a cool 56 degrees all year long.

Like Stonehenge, but with boats and oodles more charm.

This small town bank is very aware of its name thank you very much.

The oldest continuously operating Catholic school west of the Mississippi.

Revitalization efforts converted a former U.S. military heliport into a sprawling urban park.

This German fountain of a legendary apple wine-loving drink thief will spit on you.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Along the banks of the River Rhine lies a park that seems unassuming, but beneath the surface lies a long and fascinating history.

A memorial for a racecar driver who died while trying to set a land speed record on the autobahn.

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

This museum explores the history of the city's public transportation. Its collection includes the world's oldest preserved electric trolley car.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

Indiana's oldest sternwheel paddleboat has been plying the placid waters of Webster Lake for 90 years.

The first attack on the continental U.S. during WWII occurred off the coast of a quiet California golf course.

The ruins of the castle that chemicals built.

Coastal dunes, site of buried Egyptian movie set and former utopian colony.

Factory that once supported an entire company town of 350.

California's oldest wind harp represents a historic piece of America's Danish history.

With its peeling paint and faded sign, this theater-turned-recycling plant is a nostalgic relic of 1950s Americana.

This church houses the “incorrupt” body of its founding Bishop.

This replica of the Greek structure is in the heart of Nashville.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.