One of the few working locomotive roundhouses in the United States.

A moss-covered statue of a Japanese Buddhist deity stands at a quiet temple in downtown Osaka.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

The empty tomb that houses the memories of Roy Bertelli's revenge.

Only six people can sit inside this delightfully quaint sanctuary.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

A real flying saucer, contracted by the U.S. Air Force.

This stuffed pigeon of war had the very serious name "John Silver" until he lost a leg in battle.

An architectural oddity hides in plain sight on this iconic London bridge.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

One of the largest open-pit copper mining operations in the entire country.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

Rare recess caves fill this unbelievably beautiful Ohio park.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

The second-oldest garden cemetery in the U.S. was also a college brainstorm spot of Stephen King.

This shallow cave got its name from copious amount of human bones found inside.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The little-known final resting place of one of America's greatest writers.

Faces carved into the cliffs create an otherworldly walking trail.