This monument built by Japanese American immigrants spent decades underground.

Now a pedestrian bridge, this was once part of a narrow-gauge railroad that ran along the east coast of Kauai.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

This stream-carved gorge has inspired poets, hidden smugglers, and trained soldiers, all without losing its beauty.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Remnants of a Victorian garden feature sitting in public woodland.

The UK's oldest theme park slowly slips away.

This lighthouse was crafted as penitence for the theft of wine bound for a monastery.

The oldest working mechanical clock in the world.

This giant geoglyph of mysterious origins is now the site of neo-pagan rituals.

This mysterious chalk figure of a horse has been recreated and restored for more than a century.

One of the few surviving "Wigwam"-themed motels.

This collection of over 50 classic pinball machines awaits visitors to downtown Roanoke.

This tower was once used to create ammunition for early settlers.

The birthplace of Appalachia's only first lady, who some have dubbed the United States' "first female president."

A store full of vintage and indie toys designed to bring out the kid in even the crustiest of adults.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Roadside Americana, fairy tale characters, and Austin quirkiness come together at this magical course in the heart of Texas' capital city.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

The scene of the largest surrender of Confederate troops at the end of the American Civil War.

A giant cement churn carries the legacy of American resilience, unity, and greed.