The quintessential Japanese rock garden has existed for more than 500 years.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Pick up all of the cosmic knick-knacks under the sun or take a creative writing course, all offered in this novelty storefront.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Tour the sci-fi-esque reality of governmental disease management.

This glamorous old building is said to have inspired the Tower of Terror.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

"In the Dark" Restaurant in Paris offers dinner in complete darkness.

Every color in the rainbow awaits.

These azure waters were thought to lead to the Mayan Underworld.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

The ancient tomb acts as a calendar that keeps perfect time.

The final resting place for the remains of 143 Habsburg royalty.

Eighty million natural history specimens call this gargantuan museum home.

The hallucinogenic center of the ancient world.

An unassuming secret door once led to a legendary watering hole.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

The underground sanctuary of a mysterious ancient cult.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

This series of Scottish caves has no clear purpose other than baffling historians.

Geothermal waterfalls in Tuscany.