Reminders of the Battle of Berlin still scar the railway.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

The most visited, and possibly most controversial, museum in Germany.

A slice of central Asia in the middle of Berlin.

A fascinating insight into daily life in the Eastern Bloc.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

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

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The largest fountain in Bratislava.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

A fountain standing as a testament to a doomed alliance.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

The mile-long pier stretches from a ruined fortress out into the Baltic.

This stoic bronze soldier stands as a symbol of Russian sacrifice or Soviet oppression, or maybe both.

The Guardian of Tallinn.

An artificial date palm stands as a memorial to Warsaw's Jewish community.