The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

The most decorated dog of World War I is preserved in the Smithsonian.

Home to items never before seen by the public.

Illegal drag racing two stories beneath Chicago’s streets.

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

Huge abstract sculptures of the Puerto Rican Flag.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

This urban drawbridge gained eternal pop culture fame when the Blues Brothers jumped it while it was raised.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

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

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

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

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

This historic hotel invented the chocolate brownie.

Cemetery featuring rare glass-fronted columbarium.

All of Chicago's wood-paved streets are long gone but two alleys remain.

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

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.