This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.

A semi-scholarly approach to sex.

This natural marble cave is one of only five national monuments in Oregon.

The longest continuous lava tube in Oregon.

Formerly secret, precariously perched boulders.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

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

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

An inconspicuous footbridge beloved by San Diego locals.

No one knows how many bodies are in this vault in a Chicago public park.

A monument to the art of slicing people open.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

A music-filled, booze-soaked oasis in the desert.

A fake town founded by Western movie stars is now becoming a hip desert community.

On a barren hillside in the Yucca Valley, the recently restored Desert Christ Park has attracted pilgrims and kitsch hunters for over 50 years.

This massive redwood tree has a hole in the base big enough to drive through.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

A hotel and restaurant serving as the mecca of kitsch.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A hidden subterranean installation offers a view of the sky.

A modern mechanical planetary system, part of a 10,000 year clock.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Tiki luxury on Nob Hill.