The 1852 novel "Uncle Tom's Cabin" lends its name to a subway station, a street, and several shops on the edge of Berlin.

Started as a kitchen garden, now the second largest botanical garden in the world.

Metro station with a claim to rock n' roll fame.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

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

One of downtown Berlin's last reminders of its Communist past.

The massive white mound and accompanying water terraces are a striking geological oddity.

Everything from miniature biblical scenes to life-sized statues are almond-based at this sweet and nutty gallery.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.

A two-way chairlift system between Zugliget and the highest point in the city.

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

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

Time stands still at this serene burial ground in the center of Budapest.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

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

Featuring a casually threatening atmosphere along with dessert and coffee to die for.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

Beyond being incredibly fun, not much can be said about the Hole with certitude.