Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A monument to the defenders of the Arctic in Murmansk, Russia.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Monasteries on rock pillars, once accessible only by frayed ropes.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

Three columns of volcanic rock shoot out of the ocean.

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

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Walk in the footsteps of the gods and straddle two tectonic plates.

An encyclopedic collection of mammal penises.

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

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

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

A magnificent, iconic stone tower in the Scottish Highlands.

This beach runway is off limits during high tide.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.