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

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

When ecosystems collide in the arid Southwest.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.