A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

A psychedelic labyrinth on the San Francisco bay.

This tiny stone in a children's park is what remains of an ancient, once-worshipped object.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

This artsy public restroom is shaped like a giant john.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The first piece of public art dedicated to LGBT rights.

Red frames showcase remnants of one of New York's original subway stations.

The best B-movies filmed on a shoestring budget were born here.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

A modern zoetrope on the New York City subway.

100 massive sculptures in the Hudson River Valley.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

There must be a pun in this haystack somewhere...

The most confusing clock in New York.

The site of the deadly Triangle Shirtwaist Factory Fire.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

An annual extravaganza of Broadway theater memorabilia.

Avoid gangster interaction while window-shopping.