This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

The largest land animal skull ever discovered.

Only museum dedicated to women pilots, with personal artifacts from Amelia Earhart and other aviatrixes.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

Portlandia is the second-largest copper repoussé statue in the United States.

A walk through the historic city center, under the streets of Seattle.

A museum dedicated to the history and exploration of both popular music and science fiction.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Historic funicular railway, believed to be the shortest railroad in the world.

The legendary building that needed ghostly approval before being built.

One of New York's most iconic authors is strangely honored by this Oklahoma park.

Nature's biggest mammal swims in landlocked Oklahoma.

An enormous pink granite batholith, long attributed with spiritual powers by the Tonkawa Indians.

Three hundred years of preserved Spanish colonial history in San Antonio.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

A grove of colossal man-made flowers built to collect the sun's rays.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

An emerald-green grotto just a short trip from Austin.