Places aeholmquist Wants to Go

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

A beautifully eclectic mix of architectural styles.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

The attic of a four-century-old canal house hides a clandestine church.

The history and future of cannabis.

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A floating cat sanctuary on an Amsterdam canal.

A curious collection dedicated to human and animal anatomy and pathology.

Museum preserving torture methods from the past.

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

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

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

The world's only museum devoted to the wonders of fluorescence.

Public access to clean drinking water was an instant hit among the masses.

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

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

The taxidermied remains of a once-great parrot.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

This historic London residence was once the womb of Scientology.

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

This knockout museum lies in a sleepy corner of London.

Children's hospital in London that operates on royalties received from Peter Pan, which J.M. Barrie signed over in 1929.

This overlooked street light once served as a KGB dead letter box.