This tombstone marks the spot where the legendary British spy met his end.

A 100-year-old Japanese command center is now a unique underground university walkway with periodic exhibits.

On the side of Christchurch Mansion is an enigmatic block of dark limestone that dates back to 14th-century Belgium.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

Legend has it that this stone moves down to the river sometimes to have a drink.

A lavender labyrinth so large it’s visible on Google Earth.

A dark, narrow tunnel that leads to a charming lake and waterfall.

The easternmost town in Alaska can only be accessed from Canada.

This whimsical stacked cabin looks like something out of a children's book.

This futuristic building is yet another architectural wonder in Dubai.

Built in the early 70s, the ruins of dinosaurs are all that remains of a man’s dream to build a free dinosaur themed mini golf course

Water of undetermined depth has attracted rare fish and cult leaders alike.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

The island where one woman reigned as a "queen" over 30-odd Japanese soldiers who refused to believe that WWII had ended.

Apparently, the whole cosmos emanates from this plain concrete tower.

Locally known as the "Onion” and the "Egg Beater,” Casper’s most recognizable buildings are beloved local landmarks to many, and eyesores to others.

Fine dining 20 feet below the surface in the Indian Ocean.

An underwater restaurant, surrounded by a coral reef.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

This Connecticut ferry has been operating in some form since 1655.

You've probably seen these distinctive orange-tiled columns on the big screen.

A unique rock formation that only a few have managed to venture inside.

The only fully-realized skyscraper built by the famed American architect, Frank Lloyd Wright.