This once-private estate is now a dreamy, meditative garden that's open to the public.

A psychedelic labyrinth on the San Francisco bay.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

See massive fossils that are over 200 million years old in northeastern Arizona.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

A huge musical instrument played by the ocean.

The largest earthwork effigy in the world.

Less a museum than a bizarre fantasy world created by artists and engineers.

This historic stone bridge has an entire neighborhood clinging to its sides.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Towering basalt columns, a creation of fire and ice.

Rippling sand dunes frozen in the Arizona rock.

Tubing through a cave lit with glowworms is a magical underground experience.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

The longest hedge maze in the world.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

An architect transformed this abandoned cement factory into his castle-like workshop.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.