Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Guns that have been defending San Francisco since 1904.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

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

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

This taxidermic smorgasbord was co-created by an artist poached from the Museum of Natural History.

This old residential building was once the largest flour mill in the world.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

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

This ancient settlement contains some of the largest earthen mounds in North America.

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

The tallest monument in a historic New Orleans cemetery was prompted by romance and dash of pettiness.

Tiny historical streetcars wind through a small scale version of Crescent City in this whimsical train garden.