For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

The last Victorian market in Belfast.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

A series of stained glass artworks that depict images of the hit TV show.

A hundred copies of Antony Gormley's naked body stare out across the water.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Everyone's favorite clay duo immortalized in bronze.

Oliver Cromwell marched his army over this narrow bridge to victory at the Battle of Preston in 1648.

This abandoned Brutalist tower looming over the M6 Motorway once featured a restaurant.

This sprawling, Brutalist estate feels like a city within a city.

One of four sister bronze sculptures dedicated to the widows and orphans of an 1881 tragedy.

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

Hundreds of years ago, this lion-shaped door knocker could help a person accused of a crime find temporary safe haven in Durham Cathedral.

A statue commemorating the perilous journey made by the monks who delivered the body of St. Cuthbert.

The second smallest castle keep in England.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

Dating back almost 400 years, the oldest public collection library in the United Kingdom was once the study hall of Karl Marx.

Once called "the biggest room in the world," this Victorian-era hall is so large that it contains a smaller 1970s heptagonal theatre.

This 19th century police station now puts the history of the Manchester City Police on display.

The remnants of a depressing public toilet are now a hub of ever evolving street art.

Over 70 independent businesses have set up shop in this former Victorian department store.