An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

An Aztec snake god has taken the material form of an apartment complex.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Extraordinary sculpture garden created by an eccentric English poet.

A gargantuan crystal kingdom.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Unique tower has outlasted a takeover of the company.

Prehistoric animals decorate this popular outdoor park.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

This giant green head remembers one of America's jazz giants.

This pristinely abandoned filling station on the edge of a graveyard is populated solely by unsettling mannequins.

This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

An abandoned factory along the Mississippi coated by a giant mural.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

This historic motel standing at the "crossroads of America" offers a radio in every room and was saved by local protesters.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

European castle ruins in an American state park are actually the product of death and grief.

A roadside spring pooling in an old bathtub where anyone can stop and sip.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

"Iron Age" creatures fill this huckster's rusted metal sculpture garden.

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

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.