Unrepaired walls from a 1920 anarchist bomb attack.

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.

A bloodstain from "the wound of the transverberation of the heart."

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

An original apothecary from 1792.

This jail which was in service for over a century is now open for curious visitors.

In which a local geological marvel becomes a quaint roadside attraction.

A failed piece of Orientalism has become the proud symbol of a community.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

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

America's first federal monument.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

These pretty kitties killed and ate as many as 135 railway workers.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

A hot dog stand where the heads are just as hot as the dogs.

An antiquated German apothecary on Chicago's North Side.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

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

The site of the climactic scene from the classic horror film is now a historic landmark.