This 1920s Dutch barge is now a floating bookstore.

A 1950s beatnik coffee house, turned 60s counterculture hotspot, turned modern music venue.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Catacombs turned marketplace.

This massive memorial commemorates those who died in the Manchester Arena bombing.

A six-ton wedding present for the King of the Scots.

Climb inside an iron crystal magnified 165 billion times its normal size.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A piece of public art commemorating the world's first Black professional footballer.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

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

The once-a-day siren is a reminder of the days before time was standardized.

A tribute to the women who quietly kept the local steelworks alive during both world wars.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

Of the many Jesuit missions in South America, this complex is one of the best preserved.

Giant statue of a disembodied head.

The name of this suspended sculpture is Latin for "high horse," which is exactly what it is.

One of three sites in England that house the National Collection of Arms and Armour.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

This sculpture of Edward of Woodstock is surrounded by eight Victorian lamp bearers.

This ancient amphitheater was restored in the early 1990s.