One of the last Jazz Age "Wonder Theaters" in New York City.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A very classy 1920s-era bar right in Grand Central Station.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

A dilapidated dock tells the story of Titanic's missed arrival.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

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

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

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

A boulder so big and tough, they had to turn it into a landmark.

Once owned by the largest employer in Colorado, these ovens have been abandoned for over a century.

The hallowed ground of one of the worst atrocities in United States history.

One of the oldest continuously operating amusement parks in the U.S. is an open-air museum of Art Deco and neon lights.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

For over a century, it has been a tradition to raise a flag at the top of this 450-foot sandstone pillar on the 4th of July.

A long and winding trail through history led to the current iteration of this mountaintop tower.

The remnants of a 1970 plane crash remain high in the Rocky Mountains.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

Check out a hidden collection of vintage neon signs.

This gallery is home to everything from antiques, to ancient tribal masks.