To find the "unicorns of the deep" you've got to go downstairs.

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

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

A lush green oasis in the middle of Chicago.

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

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

Uh, pardon me, ma'am, but I couldn't help noticing that there's a Columbo statue in the middle of Budapest.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Museum dedicated to the terror regimes of Hungary.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

An ancient water supply dating back almost 500 years can still be found standing in East Sussex.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.