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

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This grave marks the passing of a historic Jane Doe whose identity remains a mystery to this day.

At 207 feet, one of the world's longest continuous escalators.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This replica of the Greek structure is in the heart of Nashville.

Enormous lake at the bottom of a unique cave system.

The U.S. Supreme Court's secret Cold War relocation facility in the mountains of North Carolina.

A psychological self-portrait in the form of a giant, segmented head.

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.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

The tallest The Church of Jesus Christ of Latter-day Saints temple in the world soars above the Beltway.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

FDR hoped to find a cure for polio in this Georgia town's warm springs.

The headquarters of the famous Yale society.

A massive sustainable farm designed by the mastermind behind Central Park.