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.

An abandoned town is hidden in Great Smoky Mountains National Park.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

The home and final resting place of the first native-born American saint

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

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.

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

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

A huge railroad museum with over 100 pieces of rolling stock focusing on the railroad history of Pennsylvania.

Pittsburgh's literal underground railroad.

At the largest railway museum in the United States, you can see everything from an early steam engine to a functioning Thomas the Tank Engine.

This picturesque beacon was built to keep boats safe shortly after the Civil War.

This enormous fish commemorates the unplanned release of brown trout into a Michigan river.

Home to over 300 antique cars and motorcycles, including Thomas Edison's Model A.

Largest magic museum in the United States with more than half a million pieces of memorabilia.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

An abandoned generator and motor factory has become a multi-use industrial campus.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

Controversial tribute to the heavyweight champion boxer who grew up in Detroit.

This feline raises a friendly paw at drivers barreling toward the freeway.

This public baseball field is a beloved remainder from of one of the most historic stadiums in the country.

The world-record holder for the longest bridge stretching continuously over water.

A miniature baseball stadium honoring Johnny Rosenblatt Stadium, home of the College World Series from 1950-2010.