This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

This stone complex marks the urban center of a lost civilization.

This 16th-century monastery was founded to cloister the daughters of wealthy local families.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

A massive volcanic plug is now a protected area that hosts a number of bird species.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The unbelievably opulent home built for an infamous newspaperman.

An intricately carved Viking church overlooks a glistening fjord.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

A research lab and hands-on museum where visitors can experiment with retro technology.