An enormous public square and parade ground built to celebrate Ghana's independence.

One of only two pod-shaped homes designed by Frank Lloyd Wright.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

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

The only completed wing of Utah's first capitol is filled with artifacts and odd stories about its past.

A recreation of an Old West apothecary full of curios.

Bullet holes in the church wall are a reminder of the violence that followed the assassination of a high-ranking Nazi officer.

A brush maker used his factory to protect blind Jews from the Gestapo.

A collection of vintage liaison aircraft kept in flying condition and on display at an airfield in San Antonio.

Life-sized painted illusions let pedestrians blend in with the street art.

The remains of a bustling turn-of-the-century park built to showcase the wonders of electricity.

A faux European lane smack dab in downtown L.A.

The Grand Canyon of Texas.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

A towering Art Deco movie palace made to look like a Mayan temple.

There are two dozen tanks just sitting in an open field in Lower Saxony.

A B-17 bomber stands as a memorial to the residents of Tulare County who served in World War II.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A rare wayfinding portmanteau of “Street” and “Avenue.”

This sprawling concrete suburb of Kraków was designed by the Soviet Union as the model proletarian city.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.