Museu de la Música de Barcelona

Tucked inside the L'Auditori complex, the Museu de la Música de Barcelona holds a genuinely impressive collection of instruments — from antique harpsichords to guitars and uncommon folk instruments — that reviewers consistently say deserves more recognition than it gets. Its high hidden-gem score and 4.6-star rating reflect a small museum overdelivering relative to its size and modest ticket price, though some visitors wish more instruments came with audio demonstrations so their sounds could be appreciated alongside their craftsmanship.

At around an hour, it's an easy, low-key addition to an Eixample itinerary rather than a headline destination. It suits music lovers and curious generalists alike far more than families with young children.