A spectacular Petrine Baroque summer palace commissioned for Catherine I by Peter the Great.

A church of bones, decorated with 40,000 human skeletons.

The highest point in Washington state is a volcano covered in glaciers.

Europe’s most powerful hot spring supplies the surrounding region with hot water.

This beautiful, historic church looks like something out of a simpler past.

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

A sulfuric martian landscape that looks far better than it smells.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

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

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.

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

This historic Victorian hotel has a scandalous history of affairs and murder.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

An exotic wildlife habitat right off The Strip.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

A large circus museum with summer performances.

Elevated freight railway turned wildly successful urban park.

Medicinal spa created with the discharge from a geothermal energy plant.

This quiet park's strange sedimentary spires were named after Kodak's color film.

Three columns of volcanic rock shoot out of the ocean.

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

The eccentric mansion of one the most popular horror authors of modern times.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.