My friend and I have purchased the Terceira experience package from azoresgetaway.com. Six nights with one full day van tour, one whale watching and half day city walk. The full day tour is scheduled on the 4th day. I requested to do it sooner so that we can get a brief idea of the island and re-visit places we like. Unfortunately it can't be arranged. We don't drive and plan to explore the island on foot and by bus mostly, if possible. Or hide a cab if needed. We have 3 full days and 2 half days to fill up. Please suggest things to do/places to visit. Will definitely visit the garden next to the hotel we stay, explore the old streets of Angra do Heroismo, and lava tubes. Thanks for any ideas.