A young botanist's horticultural vision realized through a lifetime of planting, tending, and collecting seeds.

The first park built over a freeway is a brutalist masterwork.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Home to the deepest rift anywhere on Earth.

Seattle’s Whimsical Mural Master.

A beautiful final resting place for some of the noteworthy deceased.

Peruse rare tomes like poetry bound in pearls or books with branches and berries growing out of their spines.

Bonsai trees that are up to a thousand years old.

An extraordinary mixture of natural beauty and man-made phenomena.

The only theatre in the world constructed specifically for sound movement.

A ceramic-tiled room at the Seelbach Hotel said to have secret tunnels used by Al Capone and a crowd that helped inspire F. Scott Fitzgerald's 'The Great Gatsby.'

Remnants of a forgotten 1920s speakeasy and Prohibition-era murals were discovered in its basement.

This Seattle store is packed with all sorts of curious creatures and creations.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

Nevada's largest cactus collection stands outside a candy mogul's small factory.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

Natural rock water slides hidden in the remote forests of northern Idaho.

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

Spiral labyrinth hidden in the hills above Oakland, CA.

A world-class observatory in the California desert.

A strange house built only at night, with rumored mystic inspiration.

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

No one knows how many bodies are in this vault in a Chicago public park.