What was once believed to be a church floor turned out to be the artwork of geology.

This cave resembles the Star Wars Jedi master.

These unique and ever-changing caves are a wonder of Iceland.

A tiny village church in dramatic surroundings.

A museum celebrating Icelandic history and technology.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

A modern Nordic Pompeii on the Icelandic island of Heimaey.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

This museum explores how a 1973 volcanic eruption forever changed this small Icelandic island.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

This educational and eco-friendly community is Iceland's "home of the sun."

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

The Hveragerði fissure runs through this unassuming shopping center.

A geothermal paradise with bubbling mud pools and bright blue hot springs.

This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

A popular Icelandic children's story comes to life inside this cave.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

This 500-meter-long memorial pays tribute to the hundreds of thousands of lives lost to COVID-19 in the UK.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

Run by the same people as a subterranean art space, this pub does double-duty as a Cave of Wonders.

The ruins of a once-mighty medieval palace are hidden away in otherwise modern London

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Scattered throughout London are ancient remnants of the city's former bounding wall.