On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

This Italian foot path winds through the mountains via 52 individual tunnels.

These caves are home to a small church and were used to age cheese.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

This old medieval prison tower has been a site of astronomical research for more than 250 years.

The beautiful baroque library of the Hapsburg empire.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

This former insane asylum now holds a pathological anatomy museum.

Macabre museum devoted to historical Viennese murders.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Austria’s oldest brewery makes beer with flaming-hot granite.

This splendid tomb may look fantastic, but there's nothing in it...

At this exhibit on the world of poison, venomous animals steal the show.

German and American troops joined forces to defend this fortress during the strangest battle of World War II.

A three-shelf library serves as a memorial in the Jewish cemetery of Krems.

These 12th-century catacombs carved into a mountainside were a place of mysticism and Christian hermitages.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

A magnificent collection of imperial armor and weaponry.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.