This historic castle is one of the oldest and most impressive in all of Japan.

Spend a day hanging out with domesticated Russian foxes.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

See four top-secret US spy aircraft of the Cold War era, including the legendary SR-71 Blackbird and the A-12 Oxcart.

This museum in San Francisco's Chinatown is one of the oldest and largest archives of Chinese American history and culture.

How did a 2,000-year-old Roman column find its way to a Chicago park?

Abandoned station along an ancient pilgrimage route.

Along the Outback Scenic Byway, adjacent to hot springs, this human-made geothermal feature takes unexplained breaks.

This inverted metropolis model is the artist's "revenge" for not being allowed to have a doll house as a kid.

The remains of the medieval wall that once surrounded Paris with ties to the construction of the Louvre.

Explore an enormous collection of original Americana tucked away in a small hamlet.

Dine on dumplings at the oldest dim sum restaurant in New York.

Internet rumors, often involving Icelandic singer Bjork, have abounded regarding this isolated outcrop of rock.

A permanent outdoor art installation made up of more than 100 mushroom-shaped lights.

George Lucas donated this park to honor the birthplace of his two biggest movie franchises.

More than 7,000 gallons of water pour over these cascading red quartzite waterfalls every second.

One of the last Art Deco gas station still standing in Dallas.

Yup, that's where the name came from.

Eat your way from Ghana to Myanmar on this globe-trotting menu.

This functioning mill was built in the 1970s using parts from several other West Virginia mills.

A miniature replica of the canine that became the logo for a large recording company.

A metal skywalk leads to the top of this striking granite outcrop in Porongurup National Park.

Initially meant to immortalize the valor of the colonizer, this monument is now a symbol of Mauritanian resistance.