These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Storybook cottage in Beverly Hills was once the site of 1920s silent film studio, affectionately known as "The Witch's House."

This museum of Viking vessels allows visitors to take a replica out for a spin.

Perhaps the oldest vine in North America, this sprawling plant helps make a sweet wine.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

This stone commemorates the island's launch into international aviation.

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

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

This rare collection of human deformities displays fetuses with two faces, one eye, and "mermaid" legs.

Half of a house.

This quirky little private museum is home to more than a thousand stones, carved by nature, that resemble human faces.