This ancient monastery complex was transformed from an island to a peninsula when the lake was partially drained.

This 5,000-year-old tomb once had its own hinged door.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

An exquisite Baroque church in Vienna's old town.

The solemn exterior conceals an opulent interior of this 17th century church.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Op-art architecture designed for happiness.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

An underground city of salt.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This stunning concert hall has become a symbol of Iceland's national recovery.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This black church sits alone among a field of lava rock.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Located on top of mines that run through Broken Hill.

A vast and opulent collection of art and show dog memorabilia collected over one man's lifetime.

You can climb to the top of the world's largest rocking horse.