A well preserved medieval fortress in Vojvodina.

After this medieval Serbian fresco was hidden for centuries, an image of it became one of the first to be sent into space.

The first European statue dedicated to the legendary musician.

A Museum with a collection of 40,000 matchboxes.

This historical village takes you back to the 19th century.

An 11th-century Byzantine church with medieval Serbian history and spectacular views.

A quirky little wax museum is home to some of the most famous Serbians in history.

Operating continuously since 1903, this "milestone" facility transformed the regional economy.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

A Serbian church lit by chandeliers made of weapons.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

Pilgrimage site for star-crossed lovers.

Erotic art covers the walls of the largest ancient pleasure palace.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The stunning interior of this Gothic church is covered in ornate gold details.

Elaborate tile work in this railway station tells the story of Portugal.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.