Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

Half of a waterfall goes into the river while the other half seems to disappear.

One of the most unusual geological features, recognizable from a dozen hit movies.

A house carved into a rock in the 1940s.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

Ruins of a Carnegie family mansion on Cumberland Island.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Legends surround this jagged rock formation in the New Mexico desert.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This free, take-a-book shop seems like a trick but isn't.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

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

Couple's personal collection of pinball machines turned public pinball museum.

Dig for your own trilobites in this goldmine of invertebrates.

The longest living non-clonal organisms on Earth.

A lush green oasis in the middle of Chicago.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Moonbows over Kentucky.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.