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

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

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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.

The first declared National Monument in the United States.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This shop for all your super spy needs hides an educational secret.

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

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

The seamy, underground secrets of Portland's criminal past.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Stroll through a wonderland of stupendous moss-covered trees.

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

Enormous lake at the bottom of a unique cave system.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

A winding path built in secret on the edge of the continent.

A giant Troll lurks under one of Seattle's oldest bridges.

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

Elevated freight railway turned wildly successful urban park.