One of the famous Czech artist's lesser-known Prague installations appears to be a glowing fetus affixed to a drainpipe.

Barça football fans might see the insignia hidden in a church window as a divine sign.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

The largest fountain in Bratislava.

These barriers stand as stark reminders of Northern Ireland's troubled past.

This once-derelict building is now one of the most beautiful bookstores in the world.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

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

It was once nicknamed "the most bombed hotel in Europe."

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

The unusually large seat sits atop the base of a ruined temple.

A serious museum dedicated to two German comedians.

A small square plaque marks a failed assassination attempt that could have changed history.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

This century-old cinema house has a marquee that has been hand painted by a single man for over 25 years.

Go surfing on this urban wave, "hacked" by local surfers.

King Ludwig I's collection of beautiful women.

The footprint of a frustrated devil in Munich's Cathedral.