A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

A little-visited waterfall in an otherworldly landscape.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

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

A winding, blood-red tunnel of hardened lava navigable by foot.

An encyclopedic collection of mammal penises.

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.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

Staves, storm-calling, and of course, necropants.