"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

The loneliest island in New York.

San Francisco's newly reopened hands-on science museum.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

Caves famous for the dragon-slaying saint who lived there.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Resonating tubes make music from highway overpass.

The curious underground history of keeping Paris clean.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

4,000 monkeys used for medical testing on an island off of South Carolina.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

Welded sphere dropped from space.

The remains of diamond fever taken over by the desert.

An enormous concrete structure built over a nuclear crater.

Railroad came. People came. Railroad left. Town died.

Colorful collection of antique musical oddities.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Rebuilt remains of a temple to Roman god Mithras.

Museum preserving torture methods from the past.