A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

The second-largest ceremonial mound in the United States is an artificial hill that is loosely shaped like a pentagon.

This iron and wood Civil War city-ship was the first vessel to be sunk by an electrically detonated torpedo.

This two-room shotgun shack in Tupelo is the birthplace of a King.

This architectural triumph is the only Frank Lloyd Wright house in Alabama.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Only known mainland rookery of the threatened Stellar sea lion.

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

A colorful architectural gem in Seattle's uniquely modern Central Library.

Shoreline strewn with the remains of ghostly fallen trees.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A vinyl-lover's Shangri-La.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

Home of Howard Hughes' Spruce Goose.

100-year-old shipwreck you can walk up to at low tide.

Lighthouse-cum-columbarium where "Nor'easters" and grandma go to die.

The largest wooden building in the world now houses a fascinating collection of aircraft.

Mountain known by the Tillamook Tribe as "the place of the supreme deity."

A massive sea stack famous for its appearance in The Goonies.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

Former 1954 Del Mar Train Station now serves signature cocktails and delightful culinary treats, and still operates as a Metro stop.

Two groundbreaking brothers from Pasadena.

One of Hollywood’s favorite government buildings.