Massive crater in central Oregon.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

The ghostly remains of an accidental sea.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The Giant Lemon of Lemon Grove.

New fungal and bacterial species call this deadly lake home.

Introducing the Green Fairy to her fawning masses.

Famous for its bio-luminescent inhabitants, known as "Dismalites" .

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

Site of the greatest known waterfall that ever existed.

Two massive rock outcroppings on the Oregon coastline.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

A sculpture for the sun and stars, created by Nancy Holt.

The second oldest continuously operating bar in Louisiana.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

A snapshot of the city's fascinating voodoo culture.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

A true roadside icon standing on the same plains that the herds once roamed.

A "haunted" landmark on the coast of Southern California.

The site of murders and Satanic cult gatherings.