An ancient Egyptian temple in the middle of Madrid, Spain.

A reconstructed medieval gateway that was the magnificent entrance to the capital city dating back to 1037.

The Swedish flag over this small naval fort signals that the nation is at peace.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

This small Slovenian town has become a magnet for microbreweries.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

A long-buried ancient ruin unearthed right in the middle of the city.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

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

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

In this truly magical place, rent hasn't been raised since the year 1520.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The oldest housing complex in Riga is a mini timeline of architectural trends.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A sharp sculpture made of thousands of pieces of jagged glass.

Where commuters walk through remnants of an ancient Greek necropolis.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.