The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

The oldest church in Iceland is one of the few to feature ornate decoration.

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.

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

Climb right into the heart of this colorful Iceland volcano.

The most powerful waterfall in all of Europe.

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

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

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

Rising from the sea like a stone monster.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

This abandoned Belgian fortress is purposefully being left to nature.

This ghost town in Belgium will lose its street art when it ceases to exist.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

This small museum is basically a time capsule of daily life in the Soviet Union.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.