A colorful architectural gem in Seattle's uniquely modern Central Library.

This semi-secret garden in south Seattle emulates a traditional Japanese garden using the plants of the Pacific Northwest.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

A museum of natural history, Edwin Carter's original log cabin home and workshop houses taxidermy specimens.

Inside this casino, visitors are treated to slot machines and a rare German Christmas pyramid.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

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

The clock that sets them all.

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

A former utopian healing center created by a huckster and built by derelicts.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

These millipedes glow not out of attraction, but as a not-too-subtle warning.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

One of the last free public hot springs is decorated with hippie art.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

Explore 10 acres of environmental sculptures.

A meditative space out of a fantasy story.

Quite simply the largest tree in the world (by volume).

Towering basalt columns, a creation of fire and ice.