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

Towering basalt columns, a creation of fire and ice.

A natural dome made of volcanic glass in Inyo National Forest.

The interior of the Overlook Hotel in "The Shining" was based on this Yosemite original.

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

The flow from this waterfall sometimes comes out of springs below its rim.

At the edge of the high desert, California's second-largest natural lake is home to a unique subspecies of trout adapted to its alkaline waters.

Come for the speed, leave in love with the desert.

Dozens of houses in the Adirondack Mountains are reminders of a literal "cottage industry" to cure people of a deadly disease.

A castle built for love, and abandoned due to heartbreak.

Watch maple syrup being made without ever leaving the city.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

This massive, ancient stone was disassembled and then put back together again.

Lost subway station nestled beneath Toronto's busy commuter line.

This unusual structure may be on its way to becoming a cultural landmark in Toronto.

Known as "Toronto's Flatiron."

One of the largest underground systems runs under Canada's largest urban center.

The artwork commemorates the many ways 20th-century people perished while on the clock.

This half-ton piece of the Alps sits at the base of the CN Tower.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

This urban oasis is a marvelous meld of music and landscape architecture.