Nevada's largest cactus collection stands outside a candy mogul's small factory.

A meditative space out of a fantasy story.

The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

Accessible only by train, the beauty of Agawa Canyon Wilderness Park is worth the journey.

A boardwalk winds above this beautiful bog full of wildlife and a rare type of turtle.

Canada's oldest railway tunnel is illuminated in a rainbow of color as it passes under the streets of this small city.

A school teacher's massive and terrifying self-built castle.

Little island known for its massive beachfront "flowerpot" pillars.

Soaring over the Niagara Whirlpool since 1916.

305 homemade stone stairs wind their way up the Hamilton escarpment.

These strikingly barren, rolling red hills were caused by bad farming practices.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

This natural sea cave hides a small wonderland of natural turquoise beauty.

The Victorian-era greenhouse is stuffed with tropical plants, and open 365 days a year.

Stunning views over Ontario's old-growth pine forests.

It's 2 billion years old!

One of Mother Nature’s geological gems, home to many prehistoric fossils.

The handsome statue is a tribute to the post riders who traversed 52 miles of tough Arizona terrain.

These cinderblock farmhouses were actually World War II radar stations in disguise.

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

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

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

A rare wayfinding portmanteau of “Street” and “Avenue.”