In the heart of Barcelona's Ciutat Vella ("old city") sits the world's most beautiful marijuana museum. It's a 15th-century palace acquired in 2002 by Dutch entrepreneur Ben Dronkers, who spent the next ten years renovating the mansion. The Hash, Marihuana Cáñamo & Hemp Museum opened its doors to public in 2012, and weed aficionados can dive into a huge collection of artifacts related to cannabis cultivation and utilization.
There are paintings, sculptures, photographs and posters for art lovers; while science enthusiasts can explore the room that holds one of the world's largest collections of medicinal cannabis bottles, apothecary kits and prescription vials. The museum also exhibits antique smoking pipes, pre-war machinery once used to process hemp, and other pot-related paraphernalia.