This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The first declared National Monument in the United States.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

A cemetery housing wild west legends in South Dakota.

This former crime corner has been turned into an eclectic community center.

There are owls with glowing eyes in Herald Square.

A bit of retro transportation flair preserved in the world's largest department store.

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

Try not to get slimed in Tribeca.

During the 19th century, you could pay for violence off a prix fixe menu on this Manhattan street.

Avoid gangster interaction while window-shopping.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

One of the most dazzling dioramas at the American Museum of Natural History is also one of the oldest.

The trials and tribulations of marking Poe's grave.

A hidden alley in urban Baltimore is a haven for graffiti artists.

Once America's tallest structure, now a Baltimore landmark.

A museum dedicated to exhibiting remarkable outsider art.

On the Hudson resides one of the largest clocks in the world.