Geothermal waterfalls in Tuscany.

The remains of the first punk club in L.A.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A popular swimming hole that hides one of America's most deadly diving spots.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

This grand mansion has starred in everything from Bones to Buffy.

When ecosystems collide in the arid Southwest.

A massive underwater sinkhole made famous by Jacques Cousteau.

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

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The eccentric mansion of one the most popular horror authors of modern times.

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

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

The highest bridge in America was built for an almost unnervingly small amount of money.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

A swing to dangle you off the very edge.

A 70-foot-deep ice cave formed by lava from Mt. Fuji on the edge of Japan's "Suicide Forest." 

A fantastic castle rumored to be the birthplace of King Arthur.

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

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Art and a pun, all in one.