An art installation commemorates journalist Nellie Bly's undercover reporting inside a New York asylum.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A former connection to City Island, it has been abandoned since the 1930s.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

New London, Connecticut still holds a grudge against its hometown son who turned traitor and burned the city.

A former poultry store that looks like a giant duck and is one of the "seven wonders" of Long Island.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

Abandoned Italianate architecture on the coast of Maine.

Explore the dark underground corridors of this graffiti-covered former military fortification.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

Trinkets and toys lovingly handmade by maximum security prisoners.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Canada's largest graveyard boasts a lot of noteworthy artifacts as well as its own computerized mapping service.

Once used to screen films for theater owners to rent, this historic building is now a start up hub.

This park pays homage to the region's rich industrial history of brick making.

Rare recess caves fill this unbelievably beautiful Ohio park.

The mounds at this site were reconstructed with the help of archaeologists and historians.

Three playfully immersive mini golf courses let you travel alongside your ball to the cup at this facility, which has been around since the 1950s.