This outcropping was once home to a medieval monastery destroyed during the Ottoman conquest.

These natural stone bridges are the largest on the European continent.

A hidden stream deep in the mountains creates one of the largest tufa waterfalls in Serbia.

An idyllic traditional timber village on a picturesque hill was built for a film.

Beautifully carved tombstones fill this unmarked graveyard, uniquely situated near the village's famous stone wine cellars.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

The oldest church in Serbia was also the ecclesiastical seat of the region during the Middle Ages.

A beautiful 19th-century mansion slowly crumbled and became a 'ghost house' after World War II.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

A well preserved medieval fortress in Vojvodina.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

Tucked in an urban forest, this restaurant specializes in homemade, healing rakijas.

A small memorial commemorates a man who died at Kilkee Cliffs.

The remains of a concrete ship sit on a sandbank between Ballina Quay and Belleek Woods.

The largest stone circle in Ireland.

This center tells the story of one of the most famous battles in Irish history.

A diminutive, thousand-year-old church believed to be the smallest in Ireland.

At the time of its construction, this hydroelectric power plant was the largest in the world.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

The remains of a 13th-century Franciscan friary have survived multiple attempts at destruction, most recently in 1921.