This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

360° views of the city plus five floors of optical illusions and hands-on science.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

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

Impossibly life-like natural history models created out of glass by a father and son.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

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

The second oldest continuously operating bar in Louisiana.

The famous author's cottage hideaway.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

A sprawling collection of over 106,000 toys from around the world.

A storybook European village in Berkeley.

A self-taught Siberian craftsman creates a fantastical and personal design for his 19th century village house.

An enchanting monastery in the Spanish countryside appears lifted from a fantasy tale.

An architect's childhood fantasy treehouse made real.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Prove you deserve to be fed by Kenny Shopsin.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

A take-out restaurant that only serves cuisine from countries with which the United States is in conflict.

Dim sum, served in a grand old theater.

The last Americana on Route 66.