Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This sheep farm has been forever transformed since being built for “The Hobbit” film series.

The unexpectedly beloved remnants of a controversial thermal power plant.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

'Cause the fence start shaking, the earth was quaking.

A beautiful but toxic fountain of mercury.

The little-known final resting place of one of America's greatest writers.

An ancient octagonal weather station named for the eight Greek gods of wind.