The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

The loneliest plant in the world resides at the Durban Botanic Gardens...mostly.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

A 'living museum' in Leiden, the oldest of its kind in the Netherlands.

A museum in the former home of Marxist revolutionary Leon Trotsky.

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

A market for witches is hidden within a train station.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

Tucked behind the Institute of Neurological Science down a decrepit street resides the largest display of human brains in Latin America.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

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

Folky pharmaceuticals abound in this medicinal reliquary.

A collection of venomous snakes and reptiles for the whole family to enjoy.

This 15th century pharmacy displays a beautiful collection of ancient medicine jars.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The history and future of cannabis.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A massive cave complex boasts some of the clearest water (and most charming bats) in the world.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

This historic stone bridge has an entire neighborhood clinging to its sides.