Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

The eccentric mansion of one the most popular horror authors of modern times.

Ohio's 19th-century communist micro-society.

Now in disrepair, this 19th century station was a stop on of the famed B&O Railroad.

This burger joint is named after everyone's favorite carnival prize and is adorned with a giant one over the door.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

The inventor of a number of hybrid corn species is immortalized with a field of giant corn.

The angel of death appears to weep black tears at this grave marker.

The only arched bridge made of stone on the entire Mississippi River.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

An experimental, automotive replica of Stonehenge.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

One of the smallest towns in the United States.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

One man's ambition created this psychedelic log home.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

One believer transformed a local curiosity into proof of Vikings on the Great Plains.