This Maryland farm is known for its amazing corn mazes and its 30-foot junkbots.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Turnip-shaped island just off the Michigan shore in Lake Huron.

Giant origami sculptures tucked into desert scenery beckon passers-by to explore further.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

Megachurch turned Catholic church comprised of 10,000 glass panes.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

One of the oldest living oak trees in the Southeast.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

The largest self-built castle in the U.S., six decades in the making.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

A world-class observatory in the California desert.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

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.

Abandoned concert venue legendary for its rock counterculture.

These aggressively sustainable art homes look like something out of 1970's science fiction.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

A psychological self-portrait in the form of a giant, segmented head.

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

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The longest living non-clonal organisms on Earth.

From scholastic to sepulchral - now under reconstruction.