A Hawaiian stairway to heaven—that you can't climb.

The largest drain hole in the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

The highest bridge in America was built for an almost unnervingly small amount of money.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

The site of one of history's most indelible and horrific tragedies.

The unbelievably opulent home built for an infamous newspaperman.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Massive crater in central Oregon.

This ancient octopus-like tree was saved from destruction thanks to shady reporting.

Unrepaired walls from a 1920 anarchist bomb attack.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

This red-eyed chrome beast pays homage to the popular modern myth of West Virginia's insectoid monster.

Hunting trophies decorate Oregon's most unique bar-restaurant.

One man's lifelong obsession with death.

A vertically floating hemlock controls the waves and weather at Crater Lake.

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

This golf ball–shaped former desert real estate office now houses a UFO museum.

The sun acts as a key that only fits this giant keyhole twice a year.