This unreal Portuguese palace looks as though it's made from a pile of different castles.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Giant topiary dog once played a role in a terrorist bomb plot.

Architect Le Corbusier built his friend a cubist house to match his impressive collection of cubist art.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

The celebrated eyesore created by starry-eyed sweethearts.

This bridge was constructed from the rubble of the infamous Bastille.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The modern birthplace of Irish freedom.

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."

Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

This aging storage facility is the world's largest brick warehouse.

Pop culture has helped to keep this iconic British building from being destroyed.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Slaughterhouse Five opens its dank doors to fans of Kurt Vonnegut.

A church of bones, decorated with 40,000 human skeletons.