Hidden in magnificent rolling countryside, see what may be the largest modern stone circle in the world at Wisconsin's very own "Stonehenge”

A monument to placate the spirits of an ancient forest.

Thousands of unmarked, sunken graves in a pauper's cemetery.

A Korean village where times stands still.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A detailed, loving tribute to America's most isolated city.

Tiny silver and copper fish set inside blue-green lights are like windows to the underwater world.

The kind of mixed-up place that drives archaeologists crazy.

Brooklyn’s wildest restaurant is serving ice cream in snail shells and marrow bones.

A volcanic core jutting above the plain between the Snake and Boise Rivers, a marker identifies the reference point for all U.S. Government Surveys in Idaho.

When in Idaho, sleep in a giant potato.

This curious and colorful space invites visitors to delve into the hidden and often mind-boggling world of caterpillars.

A multicolored mineral mound dribbles piping hot spring water right off the side of a highway.

This sculpture is a cross between an observatory and an earth mound to honor the community's rich history.

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.

This cemetery is all that remains of a school for "wayward" girls.

Hundreds of fiberglass structures line the side of the road in the middle of nowhere.

The best collection of Mudéjar building replicas gathered in a theme park in Olmedo.

Secluded springs in the Rio Grande Gorge offer hot bathing beside the haunted ruins of a stagecoach stop.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

Dozens of bronze sculptures are woven into the landscape along this trail.

Despite monuments in other locations, this spot in a South Dakota field is recognized by the U.S. National Geodetic Survey as the center of the 50 states.

A stone marker dedicated to a Black veteran of the American Revolution who refused to leave his land near Walden Pond.

Founded by French colonists in 1919, this mountain resort has been transformed into one-of-a-kind theme park.