The last king of Poland was interred in this church nearly 200 years after his death.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

This bridge was constructed from the rubble of the infamous Bastille.

In the heart of Luxembourg's "little Switzerland" weaves a breathtaking natural sandstone canyon with a mythological past.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

Breathtaking and huge 430 year old maps of Italy.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

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

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

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

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

Featuring the last fully walkable parapet walkway in Europe.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

One of the tallest lighthouses in the world also serves as a monument to the fallen of World War I.

A cone-shaped top and cylindrical body set this 900-year-old structure apart from other Italian bell towers.

This limestone outcropping was once a ceremonial site for ancient Native Americans.

A museum chronicling pioneer life constructed over Interstate 80.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

Every drop of D.C. tap water flows through this old waterworks.

Washington's iconic carousel has a nice piece of Civil Rights history.

The "lovely red Vega" of the legendary record-settling pilot.