Reminders of the Battle of Berlin still scar the railway.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Super-heavy Nazi architectural experiment.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

Hungarian Jews were ghettoized during the Second World War, but little remains of the original wall that closed the Jewish people off from the rest of the city.

A 13th-century convent where St. Margaret of Hungary spent her teenage years.

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

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

A forgotten graveyard lost in the tangles of an overgrown garden.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Budapest's Communist-era statues, banished to the suburbs.

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

One of Serbia's oldest luxury hotels and a nostalgic echo to Yugoslavia in the state's former capital.

Memorial to the victims of the Holocaust in Serbia.

An old spa town in the mountains of Romania where, according to legend, the great hero Hercules once bathed.

A muddy alien landscape that is home to rare species of exotic plants.

The remains of this RAF plane and its crew were lost for decades, nearly engulfed by the Malaysian jungle.

This vanilla farm serves its crops at an on-site café.