The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

Hundreds of trees made from glass bottles make up this forest on Route 66.

These structures were inspired by both Native American shelters as well as, strangely, an ice cream shop.

This sprawling collection of saintly relics includes such fascinations as wood from the Cross of Jesus and threads from Mary's veil.

A field in which God and his son Jesus purportedly appeared to a young farm boy named Joseph Smith.

Where the Millerites gathered to watch the end of the world in 1844—and left disappointed.

The Fox Sisters, America's leading mediums in the mid-19th century, possessed a table they claimed helped them "communicate" with the dead.

This Frank Lloyd Wright summer house was designed along Lake Erie as a retreat for a client's wife.

This Buffalo museum hides an Art Deco gas station designed by Frank Lloyd Wright.

A forsaken wonder in the middle of the East Side neighborhood.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

Toxic waste disaster that founded the Superfund program.

A 1940s nuclear reactor built to produce plutonium for the Manhattan Project.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

Definitely not a clown bar.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

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 solo operation offers the world's only whey wines in flavors such as chocolate-orange.

A delightfully quirky blend of oddities spread throughout an old 1920s bank.

100-year-old shipwreck you can walk up to at low tide.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

The short-lived railroad town in central Oregon has been abandoned since the 1930s.

A Seattle oddities shop brimming with Victorian-era gems and antique curio.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.