Hemp Museum Gallery

Set inside a restored 16th-century building on Carrer Ample, the Hemp Museum Gallery packs a surprising amount of historical and botanical detail about cannabis's uses in medicine, textiles, and industry into a small, budget-friendly space. A 4.5-star rating and decent hidden-gem score suggest it overdelivers for casual visitors who wander in expecting little more than novelty. The building's age is itself a small draw, giving historical weight to what could easily be a gimmicky attraction. At just 30 minutes, it's an easy, low-commitment stop on a walk through Ciutat Vella.