Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The largest wooden building in the world now houses a fascinating collection of aircraft.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

Home of Howard Hughes' Spruce Goose.

The magic's in the hole!

A sculpture of a salmon swimming through a brick building.

Portlandia is the second-largest copper repoussé statue in the United States.

Gigantic private toy museum featuring among finest collections of antique mechanical banks in existence.

This charmingly homemade amusement park has been growing for 40 years.

An institution that preserves the history of institutionalization.

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.

This municipal playground was co-created by the father of one of the most playful characters ever.

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

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

Thousands of turbines whir at at the origin of North American wind power.

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

It's not your typical library, memorial, or book store.

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

A dwindling menagerie of anthropomorphic oil derrick animals still dot the barren California landscape.

Honoring the famed folktale author, this California museum looks like it belongs in the Black Forest.

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

A hotel and restaurant serving as the mecca of kitsch.