An abandoned masterpiece of Soviet Brutalist architecture.

The longest-serving U.S. Secretary of State and Nobel Peace Prize winner was born in this humble cabin.

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

The highest point in Washington state is a volcano covered in glaciers.

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

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.

Historians and hobbyists head to this former French outpost for the annual Feast of the Hunters' Moon.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

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

This abandoned subway station can still be seen on regular commuter trips.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The massive, original Colgate Clock is mounted on a defunct factory building that was once a prison.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Low-frequency noise compared to an idling train can only be heard by some of this industrial town's residents.

One-layer pyramid in Indiana.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The world's longest known cave system.