Concrete strongholds stand guard over the Golden Gate.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A terrific purveyor of natural history objects and curios.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The sprawling, eccentric estate of Ames and Ames, a brilliant botanist, and a genius inventor and artist.

Museum dedicated to awful artwork.

The world's largest piece of copyrighted artwork.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

Outsider art meets paleontology at this roadside reptile repository.

A museum dedicated to exhibiting remarkable outsider art.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

A former major munitions plant that has been converted into a sprawling art space.

The United States Capitol's former columns still stand.

Home to items never before seen by the public.

At 207 feet, one of the world's longest continuous escalators.