A musical instrument played by the sea.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Where the lovelorn find a home for their sentimental keepsakes.

Climb this overlooked gem's spiral staircase and you'll be rewarded with spectacular views of Glasgow.

The ornate structure is part of a building boasting more marble than the Vatican.

This two-legged horse statue celebrates a beloved cartoonist and his quirky characters.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

The "dragon babies" of southeastern Europe.

A whimsical bridge adorned with decorative dragons.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This massive subterranean fissure is known as the "underground Grand Canyon."

A church that bred legends, and served as an inspiration for the Da Vinci Code.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

An icon of the Battle of Britain is frozen in flight in a grand Victorian museum.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

Apartment complexes built into huge repurposed natural gas tanks.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Baroque celebration of the end of the Great Plague of Vienna.

Eighty million natural history specimens call this gargantuan museum home.

Holy Hindu shrine in an enormous, monkey-filled limestone cavern.

A battle between nature and architecture in the Cambodian jungle.

A succession of eerily contemplative iron figures lead from a Scottish museum to the sea.