The sign at the garden gate reads: “These Plants Can Kill.”

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

The oldest library in Scotland was built from the remains of a church to hold a churchman's library.

Perhaps the smallest monument dedicated to one of Great Britain's longest serving monarchs.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

The longest staircase lock in Britain.

A mysterious monument where a woman who records say never existed was burnt alive for being a witch.

This unusual double arched bridge runs over a picturesque Scottish glen.

The heads of two giant mythological water horses honor Scotland's horselord past.

This figure of a local merchant is said to reanimate and do a dance during Hogmanay.

The main residence of the Erskine family and the hereditary keeper of the nearby royal Stirling Castle.

A striking glass tribute to two sisters who suffered during Scotland's "Killing Time."

This pyramid is dedicated to all those who suffered martyrdom for civil and religious liberty in Scotland.

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

It's said this was once the home of King James V's pet lion.

Legend says this rock was once a chopping block for public executions.

The site of the world's first modern seismometer.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A second generation sun-powered marvel lights up the night.

The most northern place on the mainland of Great Britain.

The sign marks one of the endpoints to mainland Britain's longest overland travel route.

A solemn memorial in a majestic setting that honors a 1692 tragedy.

A double cantilever system bridge that was designed to prevent flood damage.