In summer, Grožnjan’s car-free cobbled alleys resound with musical instruments of all kinds. A local young musicians’ summer school ( stages daytime lessons, so you’ll hear instruments being tuned in the practice rooms. Regular concerts are arranged on balmy evenings through July and August. Simultaneously, the three-week Jazz is Back ( festival attracts highly acclaimed international musicians—American jazz trombonist Luis Bonilla played here in July 2014.