A crumbling hospital from the 1850s on Roosevelt Island.

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

One of only two commuter aerial tramways in the United States.

Read a book next to a Midtown waterfall.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

10,000 flowered plants bloom in the City of Roses.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

A historic arena where the Beatles played their first concert in the U.S.

Art deco landmark on the outskirts of Washington, D.C.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

A sprawling cave network created by a lone lava tube.

The world's last remaining store of its kind.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

Hundreds of handmade critters fill this tiny window gallery in the heart of Portland's Alberta Arts District.

This sandstone mansion was the home of two of Oregon's most important pioneers.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

A sculpture of a salmon swimming through a brick building.

A heavenly experience, right here on Terra Firma.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Art Deco stylings conceal the true nature of this bridge.