Where three rails and three centuries of transportation meet.

For nearly a year, General Ulysses S. Grant was based here during the American Civil War.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

An aptly-named street near the birthplace of the modern LGBT rights movement.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

From this desk Al Hirschfeld drew his influential caricatures of the 20th century's Broadway stars.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

Commemorating the spot where the famous scientist fed his pigeons.

The former hotel where Tesla invented the radio.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

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.

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

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

Memorial to the father of the Republic of China.

A former Confederate hospital serves as a remembrance of wounded and dead soldiers.

Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

An overgrown garden stands as a grim marker of an unrealized dream.

John Tyler never got to be buried at his beloved home, but every pet his family owned since has been.

A collection of vehicles across American military history.

This estate on the banks of the James River was home to a Founding Father, two presidents, a famous bugle melody, and what some say was the actual first Thanksgiving.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.