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

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

This monument to one of the largest science fiction games of all time bears the names of hundreds of thousands of players.

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

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

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

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

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

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The ancient tomb acts as a calendar that keeps perfect time.

A hugely vast Irish landscape of barren rock that stretches for miles.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A wild west land agreement was etched right onto this historic Idaho stone.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

Local legend has it that an old, decaying staircase outside this cemetery is haunted by dozens of ghosts.