The fifth-longest natural arch in the world, and the longest outside China.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

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.

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

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Three prestigious academic collections come together to create a world-class natural history museum.

A beautiful geyser under environmental threat.

Towering basalt columns, a creation of fire and ice.

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

The first declared National Monument in the United States.

A hip bar decorated with walls of golden skulls.

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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

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

The rocks in this arid basin leave trails of movement behind them.

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

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

A trash dump made beautiful by nature's power.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

Elevated freight railway turned wildly successful urban park.

The only structure left with direct ties to the Salem witchcraft trials of 1692.