A subterranean house of worship carved right out of the bedrock.

The last permanent exhibit dedicated to the Soviet leader.

The church's remarkable frescoes incorporate Finnish artist Hugh Simberg's trademark themes of death and the supernatural.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

2300-year-old Roman road connecting the empire.

A cathedral resurrected from the ashes of one of Europe's greatest urban fires.

Pigduck of Turku.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

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

An alien church provides much needed silence in the midst of a Finland shopping center.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

A 200-year-old prison that now houses a peculiar crime museum.

The weathered grave of a medieval anchoress who walled herself up in a cell attached to a church.

This unique, full-sized copy of the Bayeux Tapestry sports a few modern additions, including underwear.

A larger-than-life statue of the German revolutionist stands proud in a small town where he never lived.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Famously misunderstood wonder of the ancient world

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.