An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Who knew the Devil's domain was a hot spot for tubing?

Panoramic views of the city of New Haven and the Long Island Sound, with a side of history.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

A grave surprise in the downtown area of New England's second-largest city.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

A natural formation that resembles a camel resting in the New Mexico desert.

A wall of chewing gum moonlights as collective art.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

The land is home to swimming ponies and a legendary 18th-century treasure.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

The United States Capitol's former columns still stand.

The first memorial dedicated solely to the Black troops who fought for the Union.

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

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

A recreated sign from the movie Jumanji has become a makeshift tribute to the film's late star.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

This endearingly discomfited urinating statue commemorates the sneaky pees had by us all.

A subterranean house of worship carved right out of the bedrock.