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

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

An Anglo-Saxon cross inscribed with possibly the oldest written work of English literature.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

A museum pays tribute to the glass-making industry of Sunderland.

This gorgeous space is England's largest independent library outside of London.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

This building was once a town hall, a fire station, a prison, a dairy market, and the target for two marksmen.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

A locomotive made from 185,000 bricks celebrates the town's pioneering railway history.

Built in 1911, the Tees Transporter Bridge is one of only six transporter bridges still in operation.

An abandoned tower once used to study the cosmos hides within a thicket of greenery.

The train that took the prime minister on his final journey now rests in a British museum.

This Georgian Gothic building was created to shelter and feed deer.

These remarkable cascades are the jewels of Upper Tees.

Rare remnants of the brick-domed ovens birthed in the Durham coalfield during the Industrial Revolution.

This medieval manor house was hastily fortified when it found itself in the middle of the Scottish fight for independence.

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

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

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