Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

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

A sculpture of a salmon swimming through a brick building.

Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Inside a humble hangar is some of the best roller derby the world has to offer.

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Legend says train robbers stashed their gold within the depths of this unusual cave.

Self-built house and sculpture park where the creator can still be seen in a glass coffin.

An extensive collection of ancient Egyptian artifacts and mummies.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

Pyramid home to an obscure religious group that practices modern mummification.

A tribute to the Nirvana frontman hides beneath the bridge that was the singer's beloved hangout spot.

Natural rock water slides hidden in the remote forests of northern Idaho.

After this former brothel closed, its interior remained almost frozen in time.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

The secluded site of a 1943 plane crash and amazing rescue is only accessible by hiking through the woods.

Supposedly Satanic numbers adorn this preserved submarine sail.

Home to the deepest rift anywhere on Earth.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

Despite his legacy of work in Spain, Cuba, and Florida, the larger-than-life writer's grave is a simple affair tucked in an Idaho cemetery.

A miraculous natural phenomenon known as "the spring that breathes."