For those who dont know, Hawaii is a series of volcanic islands. We are staying on Maui which has (or is as it forms 75% of the island) a volcano called Haleakala.
We got up at 4am to drive up to the 10,000 ft high summit to watch the sunrise (with 4 t-shirts, 1 shirt, 1 jumper and 2 pairs of trousers on) and it was magical – and freezing!.