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

A friendly pub with a sordid past in cock fighting.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

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

This inn of the court provides a fascinating window into London’s legal and architectural history.

The Tudor-style cottage in the middle of the square is not quite what it seems.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

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

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

This community on a small Venetian island has taken to painting their houses in bright neon hues.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

Where Venice's gondolas go for a tune-up.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

100 year tradition of fist fights, marked by marble footsteps.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

Water and windows define this defensive Italian well.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Avoid gangster interaction while window-shopping.