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.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The highest point on the island known for buildings that touch the sky.

Mysterious 500-year-old tapestries depict a unicorn hunt.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Cold war icon and onetime "hole" in the iron curtain.

The remains of an entire Roman city can be explored in this interactive museum.

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

Museum dedicated to the terror regimes of Hungary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.