High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

An inverted staircase above the entrance to the Bethnal Green Underground Station functions as a memorial for people who lost their lives during the worst civilian disaster in the U.K. during World War II.

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

A masterpiece of Art Deco architecture hidden in plain sight in West London.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

A mysterious shape catches the eye in this 16th-century painting.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This London marker celebrates the spot where the world-famous English band was founded.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A domino effect created with Britain’s iconic telephone boxes.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Pop culture has helped to keep this iconic British building from being destroyed.

This home on a quiet suburban street is completely covered with vibrant mosaics.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Eighty million natural history specimens call this gargantuan museum home.

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