After sitting unused for decades, this abandoned communist infrastructure became a wildlife utopia.

This memorial to the victims of the Romanian Revolution of 1989 is often compared to a potato on a skewer.

Romania's triumphal arch looks out over Bucharest.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Legend says this fabled well held part of a mythical Norse tree.

A small church in Uppsala hides the grave of a renowned 18th-century astronomer.

The official meeting point for the oddly named governing assembly of ancient Sweden.

Ancient burial grounds of the wealthy.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

This famous city eluded concrete detection until the early 2000's.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

This strange sculpture depicts a giant nightmare hare crushing a man to death beneath its colossal bulk.

Nestled on the banks of a river in Nuremberg is a small museum that was once home of the city's official executioner.

This lurid German fountain plots the sad course of marriage from dating to death.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

A bronze replica of an elm tree that honors the victims that perished in Pawaik Prison.

Hundreds of notes give thanks to the patron saint of lost causes.

The giant statue and its model solar system honor the native Pole who declared that the Earth revolves around the Sun.

This charming pup is meant to celebrate the youth and stubbornness of the city's students.