Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Week-long block party becomes a competition for the best decorated street.

This semi-secret storybook hedge maze is also the oldest garden in the city.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A wellspring of creativity in an already artsy East London neighborhood.

This secret garden has bloomed into London's most unique hub of urban creativity.

This studio was home to David Bowie's first single, even if it did turn away the Beatles.

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

High-end antique collection housed in a centuries-old church.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

A flourishing garden with pigs, donkeys, goats, rabbits, guinea pigs, chickens, ducks, and sheep.

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

A network of concealed passageways lies within a busy London Underground station.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

Once a train station along the Great Eastern Railway this vibrant coffee shop and bar is where members of London’s creative class mingle.

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.