"The most colorful grottoes of the world.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

A striking 12th-century-style castle built on the edge of a cliff.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The most visited, and possibly most controversial, museum in Germany.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

At night, the enormous sculpture looks like a UFO hovering above the English hills.

These giant sculptures are supported by a bizarre menagerie of feet.

This captivating Bronze Age timber circle spent centuries concealed by the tides.

This ancient oak tree sheltered accused "witches" in the 17th century.

The Neolithic megalith was one of the first archaeological ruins protected by the British government.

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

These mysterious mazes carved on the rock may be up to 4,000 years old.

Cornish legend says these ancient circles were people turned to stone for playing hurling on a Sunday.

This quaint mortuary chapel hides a stunning Celtic Revival and Art Nouveau interior.

This 2,700-year-old woman is the jewel of the Maidstone Museum's Egyptian collection.

A stone obelisk towering over the surrounding countrysides beckons hikers across the rolling moors.

Legend says this little-known stone circle is formed from people petrified as punishment for dancing on the Sabbath.

This purpose-built dinosaur museum is shaped like a pterodactyl and holds fossils that were found in its very village.

The wreckage of an old coastal trading vessel is only visible at low tide.

Once the largest unsupported dome in the world, beating out the Pantheon and St Peters in Rome.

These 20-foot jaw bones honor a time when the leviathan bones were a sign that whalers survived the hunt.

An extraordinary collection of scientific instruments - and Einstein's chalkboard - inside the world's oldest purpose built museum building.