A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A clock designed to run with perfect accuracy for 10,000 years.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

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.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

Built during the Scottish boom in the oil industry, the village was never inhabited.

This abandoned oil depot produces world's longest echo in a manmade structure.

A striking statue commemorates the men who worked underground in Kingshill and Allanton.

A monument with a strange legend involving a horse's tongue.

Only the headframes remain from this mining operation, once one of the largest in the region.

A memorial dedicated to a boating accident that was bringing troops back home from World War I.

A well-traveled statuette of a much-beloved village icon.

One man's attempt to stay one step ahead of the church.

A controversial cenotaph dedicated to a local physician with an unscrupulous past.

These shopping center benches are actually a modern art installation.

This sculpture celebrates a boules tournament and the link between Leeds and its twin city Lille.

Constructed 20 years ago, this sculpture is slowly fading to the hands of time.