With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Medical and zoological curiosities for sale.

This sculpture presents commentary on a life in pursuit of profits.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

A multimedia experience that chronicles the atrocities of racism.

The neighborhood shop is a sort of tiny cactus museum full of exotic specimens you can take home.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A unique attraction and museum dedicated to exploring iconic roadside structures.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

A historic neighborhood church is reborn as a psychedelic arts collective.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

The United States Capitol's former columns still stand.

The site of the climactic scene from the classic horror film is now a historic landmark.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

This poor little statue is the most vandalized memorial in Washington.

The oldest continuously operating fish market in the United States.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

The home of possibly the least-loved U.S. president stands as a sort of unpopular Monticello.

The first of Lancaster's "rural cemeteries."