Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

A glowing underwater cliff attracts marine life and divers in equal measure.

A tropical paradise once home to space exploration and military installations.

Where a rare geological phenomenon created a section of rock that resembles a checkerboard.

Overlooking the harbor is a beautiful neglected mansion guarded by two Egyptian sphinxes.

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

A 12,000-year-old bog boasting rare plants and fauna.

Around 100 sculptures from artists all over the world decorate the hiking trails surrounding this locale.

Legend has it that this stone moves down to the river sometimes to have a drink.

The oldest still-existing mosque in the United States sits in a remote prairie in North Dakota.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

From grand battles to daily life, this Spanish museum offers a view of world history in miniature.

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

Mysterious library of an infamous financier and spiritual seeker.

The sunken structure looks like the victim of a catastrophic flood.

Vietnam's largest Buddha statue depicts a female sage.

View one man's eccentric collection of nearly 5,000 corkscrews, then sip some Chablis.

A honeycomb-like structure of interlocking shelves creates a beehive of books.

This little valley along Highway 1 is engulfed by thousands of lilies during the spring season.

At least according to the Guinness World Records.

Every spring, this walkway outside the Japan Mint turns into a cherry blossom tunnel.

Someone really, really wanted to save this fast-food icon from demolition.

A magical place that lets you play in and explore the world of Studio Ghibli.