The U.S. Navy's last diesel-electric submarine rests half-submerged in the middle of Portland.

The longest continuous lava tube in Oregon.

The ghostly remains of an accidental sea.

This house is a mosaic of tiled artwork sourced from local artists.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

Explore more than 130,000 new and used books in the "world's largest outdoor bookstore."

Twelve plaster figures inspired by da Vinci's famed painting haunt the desert landscape above a real-life ghost town.

The most magnificent bottle house in a town strangely full of them.

Odd outsider art installations surround a Gold Rush-era ghost town.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

A massive hydrovolcanic explosion left a half-mile wide crater in Death Valley.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

The rocks in this arid basin leave trails of movement behind them.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

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

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

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

The beautiful behemoth is one of the largest trees of its kind in the United States.

California's oldest wind harp represents a historic piece of America's Danish history.

Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

Colorful Native American paintings are hidden within this small cavern.

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