The remains of a century-old mansion that met a fiery demise years after it was deserted.

A recently abandoned psych ward at the end of Sanatorium Road.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Brooklyn's Barkaloo Cemetery is the resting place of a scant two bodies.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

One man's love of natural beauty led to the creation of this hidden granite monument.

An overlooked and unassuming engineering marvel.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

The miraculous hydrant that saved the Mission District in 1906.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Haunting and beautiful trees, doomed to die.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

The first pet cemetery in the United States.

A strange house built only at night, with rumored mystic inspiration.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

A hand-built folk art installation covered with messages of God's love.

Explore 10 acres of environmental sculptures.

A fake town founded by Western movie stars is now becoming a hip desert community.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.