A hidden three-foot-wide house separates these two regal churches.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

Closed for decades, this strange symbol of Japan's Expo '70 has finally opened its psychedelic insides to the public.

Cavemen, elephants, and eagles greet passengers driving through the town's main intersection.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

An isolated 17th-century chapel on a remarkable site once dedicated to Celtic sun worship.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

The ancient latrines of the Greeks, in all their public glory.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The most loyal of little dogs, or a Victorian era publicity stunt?

The final resting place of soldiers' loyal canine companions.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Largest lake in Great Britain measured by surface area.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.