Only known mainland rookery of the threatened Stellar sea lion.

The longest continuous lava tube in Oregon.

Treehouse motel and treehouse-building school.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

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 eerie remnants of an ancient forest were hidden under the sand for centuries.

Private collection of art inspired by cabinets of curiosity.

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

This frequently-photographed waterfall takes only a short hike to visit.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

On the Oregon coast there is a natural hole that seems to be draining the sea.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

The house where the pulp fiction writer and Conan the Barbarian creator lived.

This eclectic Austin curiosity shop is home to all things strange and unusual.

Continuing the tradition of the dime museum in style.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

Fiji mermaids, mummified remains, and recreated cryptids are among the morbid oddities at this Maryland museum.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

Tucked in the back of this amazing antique store is an important piece of medical history.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.