A 131-year-old wunderkammer of Texas history.

One part antique store, one part curiosities hodge-podge.

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

America's first federal monument.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

The largest historic preservation organization in the United States.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

This historic national park is covered in the stunning ruins of red rock pueblos.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

42nd story Pyramid shaped penthouse tops Seattle's oldest skyscraper.

The historic bar where local ship captains, traders, and gold miners would come together to do business a century ago.

The highest point in Washington state is a volcano covered in glaciers.