The famed architect designed this Minnesota gas station of the future with a lookout tower.

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

Two dozen pinball games hidden away inside a most unlikely location.

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

The whole world in one water tank.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The "lovely red Vega" of the legendary record-settling pilot.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

This lonely waterfront memorial to the men of the Titanic was erected by the "Women of America."

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

An extensive, if one-sided, history of U.S. law enforcement's war on drugs.

Yo, Adrian!

This elaborate towering structure was once famed for its revolutionary height.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.

A historic ruin just 20 feet away from a busy highway onramp.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.