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.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

This store also houses a museum dedicated to the history of these small, historic community shops.