Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

A serene space tucked amid the skyscrapers of Hong Kong's bustling financial district.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

This hidden jockey “walk of fame” celebrates the winning riders of the Kentucky Derby.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

This striking art museum holds an amazing series of curiosity cabinets.

A unique botanical garden housed in three giant geodesic domes.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

An enormous goose sits atop this nest-shaped home.

An architect's childhood fantasy treehouse made real.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This artsy public restroom is shaped like a giant john.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

Marking the spot where a conquistador gave up his search for the fabled Seven Cities of Gold.

This natural marble cave is one of only five national monuments in Oregon.

A Roman-style column in Oregon hides a spiral staircase inside.

A vertically floating hemlock controls the waves and weather at Crater Lake.

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

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Only known mainland rookery of the threatened Stellar sea lion.