A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

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

Home to a vast and influential collection of Shakespeareana.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

A tourist attraction founded around a slumping cabin.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A toxic ghost town sitting atop a massive coal fire.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

The final resting place of two (or three) presidents, one vampire, and 18,000 Confederate soldiers.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

World's first "penitentiary," meant to be humane, drove men insane.

Yo, Adrian!

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

The first American department store, and home to the largest operating musical instrument in the world.

The trials and tribulations of marking Poe's grave.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Located at the former Lorton Prison the Lucy Burns Museum tells the story of the 91 year history of the prison including the dark chapter of its involvement in the women's suffrage movement.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.