Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

The curios of pharmacist and collector Henry Wellcome.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Strange, gentle beasts resembling goat-cow hybrids roam within this patch of forest.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

A unique waterfall that some believe attracts the fairfolk.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

Ancient paintings known as the "Sistine Chapel of Cave Art."

This Parisian fountain is a little bit fantasy and a little bit nightclub.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

Sleep in a climate-controlled plastic bubble for the night.

An exotic jungle hideaway run entirely by indigenous Kichwa women.

A mechanized clock where a man fights off a dragon, crab, and rooster.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

The largest greenhouse in the world is home to over one million types of plants.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

It's possible to walk inside one of the largest Neolithic tombs in Britain.