This memorial museum chronicles the apocalyptic destruction of the First World War.

Lavish royal estate punctuated with heated greenhouses.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

A breathtaking viewing platform over the Alps.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Two planes stand abandoned after the closure of an aircraft-themed restaurant.

This war memorial holds the remains of around 20,000 World War I soldiers from both sides of the conflict.

The first Italian factory to produce locomotives is now a marvelous museum.

This medieval castle was reconstructed by Carlo Scarpa.

The remains of 50,000 World War I soldiers rest under a towering arch overlooking the Alpine battlefields.

This uniquely designed bridge served as the city gate for Comacchio.

This castle was once the home of one of the most powerful women of the Renaissance.

The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

A Roman temple perched over an Italian town, forgotten several times over.

Claude Monet immortalized this medieval bridge in two of his paintings.

This unusually shaped fortress houses a blend of centuries-old frescoes and modern art.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

This Roman underground canal was the longest tunnel ever built until the late 19th-century.

This network of roads is one of the most unique Etruscan creations ever discovered.

Built to be the ideal penitentiary, this abandoned panopticon saw several revolts and even a prisoners' coup.

According to the legend, this structure was built in a single night with the help of the devil.

An archaeological treasure trove towers over the valley of Chiavenna.

A massive bridge forms part of an aqueduct that was deemed an architectural wonder of its time.