The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

A strange rock in Chicago marks the spot where a tree once stood in honor of the 18th President.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

A hollow cement depiction of time's inexorable effect on the human body.

This former nursery supplied plants for the creation of Chicago's largest park.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

A one-armed veteran of the Battle of Waterloo lies in a cemetery for one in the middle of a Chicago scrapyard.

The final resting place of the world's first nuclear reactor.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

Where unreadable addresses are read, 24 hours a day, seven days a week.

This giant ice cream cone is the last remaining icon of a Salt Lake City staple.

An enormous image of Utah's salt flats made entirely from tape.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

This museum remembers the tough Mormon trek across America through an intriguing array of artifacts.

Visitors to this library are in for a real-world education in modernist architecture.

Pyramid home to an obscure religious group that practices modern mummification.

Here lies Lilly E. Gray, an alleged "victim of the beast," but the reason long remained a mystery.

Incredible sculptures inspired by obscure passages from the Bible.

A hidden garden of stones engraved with scriptures, a Joseph Smith Sphinx, all carved by one man.