The floor of this spectacular Baroque sanctuary is covered in memento mori.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This unique building in the main square stands out among the city's typically Baroque architecture.

These temples are among the oldest free-standing stone buildings in the world.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

Giant, friendly pelicans in Central London, the most unlikely of places.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

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

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

A huge wooden clock that is so beautiful its creator was forcibly blinded.

The site of the first battle of World War II.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The "dragon babies" of southeastern Europe.

One of the world's oldest olive trees, thought to be over 2,000 years old.

This exclusive resort has completely covered a tiny Balkan island in a 5-star warren of guest rooms.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

These massive moving sand dunes have swallowed an entire village and are still on the run.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Too much gossip or just missing curfew could land you in here for a couple of days.