Puffin enthusiasts flock to Europe's largest seabird cliff, which over one million birds call home.

This black church sits alone among a field of lava rock.

A formerly glacier-tipped volcano that inspired none other than Jules Verne.

This tiny museum's sizable collection is jammed into a former underground public toilet.

The largest whale museum in Europe allows visitors to walk among life-size giants.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

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

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Walk in the footsteps of the gods and straddle two tectonic plates.

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

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

This five-foot-tall bronze bird is a memorial to a species that was hunted out of existence.

This gravestone and its inscription inspired a movement that has spanned generations and saved countless lives.

This tiny alleyway is now a shrine to a subculture riot between the mods and rockers.

The ominously named cave is home to some remarkable ancient art.

A wonderfully preserved example of London's 1960s-style high-density, low-rise public housing.

A monolithic monument in Greater London.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

An artistic tribute to the famous singer, just around the corner from where he was born.

This hill and tower are steeped in legend, from King Arthur to the Holy Grail.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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