A lavender labyrinth so large it’s visible on Google Earth.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

Enormous small-business mecca in the Midwest, serving dozens of artists.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Strange physical sensations and optical contradictions keep visitors coming back for more.

The only surviving prototype for Buckminster Fuller's house of the future.

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

A collection of relics from the Spiritualist Camp Chesterfield.

One-layer pyramid in Indiana.

The only freestanding table rock formation east of the Mississippi.

One man's vision and a labor of love of many.

This mysterious hill seems to pull objects uphill.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A medical facility that has been kept frozen in time.

The longest navigable underground river in the United States is home to countless blind and albino animals.

A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Live long and prosper in Tennessee.

This "Plant Farm Museum" is home to the divinely inspired and visionary outsider artwork of Reverend Howard Finster.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

The mysterious 855-foot zigzagging stone wall has been baffling people for centuries.

This historic oak tree has been around for over 300 years and might last for 300 more so long as it doesn't fall apart first.