These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

The most powerful waterfall in all of Europe.

This elegant arc of a waterfall marks a religious turning point.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

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

Museum devoted to the artificial language of Esperanto.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

This ancient theater was once the home of fierce gladiatorial battles.

Baroque celebration of the end of the Great Plague of Vienna.

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

A medieval church with largest and oldest collection of Renaissance frescoes in France.

A dead saint, a deadly poison, and a mysterious holy ooze.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

The oldest botanical garden in the world that technically isn't the oldest.

A line of abandoned, alien-like fortresses dot the mountains of North Italy.

Southern Italy's spinning top village.

Europe’s oldest natural human mummy.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

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

Ancient snack bar of the Roman Empire re-opened.