The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

A sculpture of the iconic East German car on four legs is a tribute to those who traveled to Prague seeking asylum.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

A series of playful yellow penguins share a serious message about the environment.

Microscopic scenes; some call it novelty, some call it art.

An existential riddle in the world's largest ancient castle.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

Street artists transformed an abandoned air vent into the beloved Star Wars robot.

This doorless 20th-century elevator doesn't stop or slow down.

This artificial cave looks like something out of a fairytale.

Walk through Czech history in Prague's largest graveyard.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

Breathtaking and huge 430 year old maps of Italy.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

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

Venice's "Island of the Mad."

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.