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

Hot Doug's "Hot Dog" Stand.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

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

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

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

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

Elvis's own personal tropical hideaway.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This magnificent Cincinnati graveyard is also a popular public park.

A retired subway car stands alone in a field in the middle of Queens.

Elevated freight railway turned wildly successful urban park.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

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.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

One of the world's tallest statues is also one of its most hated.

The tallest hotel in Europe.

World's largest bell sits on the grounds of the Kremlin in Moscow.

One of Ireland's most infamous prisons for rebels including men, women and children.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Amsterdam's former hotspot for public executions and dissections.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.