When this 18th-century observatory's meridian was moved, it set Sweden's time back by 0.04 seconds.

The Swedish flag over this small naval fort signals that the nation is at peace.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

A steel paper plane is all that remains of a crashed aircraft that caused an amazingly small amount of damage.

A golden plaque marks the site of the mysterious unsolved assassination of the former Swedish prime minister.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

A heated statue pays tribute to one of Sweden's great actresses.

This statue and park honor the Swedish chemist Jacob Berzelius, one of the founders of modern chemistry.

What looks like a birch tree smushed between two pieces of glass often confounds commuters.

Sound travels strangely in this underground whispering gallery.

Sweden's first electric elevator remains hidden within a fortress-like building.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

The final resting place to 300 Victorian-era pets hides inside the city park.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Catacombs turned marketplace.

Hear the quietest sound from across the dome.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

An unusual round church in London with a Templar past.

Banksy gives themself artistic license with this piece of London street art.