Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

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

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

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

A monument to the man who almost killed Hitler.

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.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

A replica of the Liberty Bell rang daily from West Berlin's City Hall throughout the Cold War.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

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

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

The mystic whose incorrupt corpse still attracts the faithful.

The final resting place of the poets Shelley and Keats.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An 18th century fountain and two columns are all that remains of Rome's forgotten river harbor.

A large replica of a monumental Roman inscription is located on the side of this museum.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.