These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The commemorative stone column conceals a secret laboratory.

The fences outside some of South London's estates are made from recycled World War II stretchers.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

London's smallest police station is barely the size of a phone booth.

An unusual round church in London with a Templar past.

Eighty million natural history specimens call this gargantuan museum home.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This mural pays tribute to Atlanta natives and hip hop legends Andre 3000 and Big Boi, better known as OutKast.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

Two small markers remember the Alamo's feline protectors.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

The 40-foot-tall votive candle is the largest of its kind.

Try the frozen treat that inspired Arrested Development's famous banana stand.

Oldest building in California still in use.

This monster board rode a monster wave to break two world records.

These were the largest wind chimes in the world when artist Tom Van Sant created them for a California mall in 1967.

Fourteen curious and controversial white bunnies sit in a circle near Newport Beach City Hall.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.