A breathtakingly steep set of stairs is carved directly into the face of the sea cliffs of Bonifacio.

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

The museum moved on, but the diorama remain.

On a remote island in the northern reaches of Lake Michigan, a museum of collectibles collides with a vintage toy store.

This sprawling farm was once a Cold War-era hideaway for the nation's top diplomats.

A bunker "with enough U.S. currency to replenish the cash supply east of the Mississippi" in the event of nuclear war now protects nitrate film.

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.

The ruins of an 18th-century mansion that was once named "Mistake" by the man who had it built.

A lone historical marker off the highway and scattered debris are all that remain of this Cold War-era missile site.