An Inca spa, military outpost or maybe… both?

Beyond being incredibly fun, not much can be said about the Hole with certitude.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This turn of the century masterpiece has a mysterious goaty interloper.

Its buzzing collection honors vibrator history.

A tribute to the artist and activist who created the rainbow pride flag.

Where a demonstration led to equal rights for one of California's most marginalized communities.

Furniture tries to escape an abandoned building in San Francisco.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

The first and only carousel with a lineup entirely of insects.

The highest point on the island known for buildings that touch the sky.

Hordes of precariously balanced stone figures crowd the shores of the Hudson River.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A young woman's senseless murder led to the controversial psychological theory of the "bystander effect."

The oldest house in Manhattan is now a museum that remembers the home's sordid history of scandals, vice-presidents, and ghosts.

The drawbridge used in the filming of the movie 'Annie' has been in the open position as it was in the movie for decades.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

This mysterious marker puzzles pedestrians and infuriates geographers.

Walk over a 150 year old manhole.

How a century-old glass factory in Queens became a concert venue and arts center.

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

The oldest Dutch colonial stone house in New York City is a hidden gem on the border of Brooklyn and Queens.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

Bowl in splendor, if you're lucky.