Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Arguably Belgrade's only example of pure Art Deco architecture.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

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

Everyday, fans from across the globe visit the statue of one of the greatest Formula One drivers in history.

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

This former fascist summer camp was abandoned for decades.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Depending on how it is measured, this lighthouse can claim to be the tallest in Europe and the tallest conventional lighthouse in the world.

A once-magnificent collegiate church is falling into ruin.

A medieval house adorned with enigmatic carvings, including one of a man displaying his masculine attributes.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

The eclectic observatory castle of a 19th-century astronomer and explorer.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Giant topiary dog once played a role in a terrorist bomb plot.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This giant sculpture made of trash is a critique of society's wastefulness.

This castle has links to Portugal’s founding and struggles for independence.

A replica of the Roman emperor in glorious full color.