Mike Oldfield's "Tubular Bells II" is a sequel to his iconic 1973 album "Tubular Bells". The original album was a groundbreaking work that showcased Oldfield's innovative use of tubular bells, a musical instrument consisting of a series of metal tubes of varying lengths that produce a distinct, bell-like sound. Released in 1999, "Tubular Bells II" revisits the concept of the original, with modern production techniques and new musical explorations.