After nearly 60 years, there's still a bear at Paddington Station looking for help.

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.

Hidden behind a wall for decades, this masonic lodge was only rediscovered during renovations.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The largest greenhouse in the world is home to over one million types of plants.

Surreal riveted sea forts once protected the Kent shores from German attack.

The remains of Crystal Palace Great Exhibition of 1851.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

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

Remnants of a Victorian garden feature sitting in public woodland.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

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

Sculptures depicting Scottish and English soldiers in battle honor a 16th-century conflict.

Geodesic dome luxury retreat in the Scottish Highlands.

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

The Titanic sails again in one Scotland man's backyard.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

A small, former industrial site overlooking Loch Kinardochy.

A re-purposed wooden sculpture, depicting one of Scotland's most beloved writer's amphibious creations.

A rare remnant of an exposition that took place nearby at the end of the 19th-century.

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