Where manatees are the snowbird vacationers in these balmy Florida springs.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

This frequently-photographed waterfall takes only a short hike to visit.

An underwater city for the dead.

A technicolor place of worship for Elevationists.

Hollowed out cedar log tubs set in an ancient towering forest.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A beautiful geyser under environmental threat.

This abandoned amusement park was built on a site with a dark history.

The first declared National Monument in the United States.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A semi-scholarly approach to sex.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

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

Dramatic river bend surrounds a natural red-rocked pedestal.