Constructed in 1851, the gorgeous gothic revival Cathedral of the Isles might be Britain's smallest but every inch of it is perfectly formed. Music has always played a pivotal role in the cathedral's history. Pay a visit during one of its concerts, hear the soulful refrain of the 1867 tracker organ, a trio of pianos, and the heavenly strings of the 'Cumbrae' harpsichord, and you'll see why.