Current docking place of the SS United States, the fastest transatlantic ocean liner.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The whole world in one water tank.

Exact replica of the ancient monument, but much, much lighter.

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

A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The romance of early commercial flight still fills this Art Deco destination.

A nostalgic bibliographic gem.

There just so happens to be a court even higher than the U.S Supreme Court: a basketball court in the building itself.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The house where John Wilkes Booth conspired with his co-conspirators.

A painfully obvious spy house sits right across the street from the Russian Embassy.

Bar full of oddities, specimens, artifacts and homages to the great dime museums of the past.

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

The United States Capitol's former columns still stand.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

The world's oldest continuously operating airport was founded by the Wright Brothers.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.