A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

A reproduction of earth's many biomes.

A huge musical instrument played by the ocean.

A vertically floating hemlock controls the waves and weather at Crater Lake.

Sleep beneath the big screen at this old-school movie theater.

This scenic gorge is named after one of the most famous Bigfoot attacks in pseudohistory.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

Bonsai trees that are up to a thousand years old.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

This tree has witnessed nearly 1,000 years of history.

Shoreline strewn with the remains of ghostly fallen trees.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

The longest spit in the United States ends at a lighthouse in the Strait of Juan de Fuca.

Rustic natural hot springs in the deciduous rain forest.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Standing 191 feet tall and measuring more than 55 feet in circumference, this is the world's tallest spruce tree.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

Its 27 graveyards represent the many nationalities and ethnic groups that voyaged to this wilderness in the late 19th century.

An obscure waterfall that looks like something out of a fantasy novel.

Site of the greatest known waterfall that ever existed.

People come from across the globe to swim in this lake believed to have healing properties.

The strange phenomenon causing gravity to "work backwards" on this hill has been blamed on the paranormal.