Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

A little slice of Japan and its aesthetics in London's Holland Park.

People have been placing babies on these lilies for photoshoots since the Victorian era.

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

A dramatic art installation features a BMW flying out of a building in Rotterdam.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

London's marvelous wildfowl reserve along the Thames.

One of Oxford's greatest treasures likely belonged to England's legendary King Alfred the Great.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

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

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.