Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

Monasteries on rock pillars, once accessible only by frayed ropes.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

A mysterious shape catches the eye in this 16th-century painting.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

Giant, friendly pelicans in Central London, the most unlikely of places.

This medieval church tower has maintained its clockworks since the 16th century.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

A recently restored Shoreditch landmark with ties to Jack the Ripper.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

This small museum in a former church crypt contains artifacts of the Elephant Man, Jack the Ripper and Florence Nightingale.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

This secret garden has bloomed into London's most unique hub of urban creativity.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

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

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

This Underground station has been a popular filming location for decades, even before it closed.