Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

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

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

A scandalous Art Nouveau collaboration that set Paris all atwitter at the turn of the 20th century.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

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

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

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Try not to get slimed in Tribeca.

Enormous lake at the bottom of a unique cave system.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

A Roman temple perched over an Italian town, forgotten several times over.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

The oldest operating pharmacy in the world features 800-year-old recipes.

Drink wine handed out through a window as part of an age-old tradition.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Architectural monsters are devouring this palace's every door and window.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.