Mahon will mostly be written on timetables, front of buses and signposts as Maó, it's local name. If you are staying longer than a week take a trip on this good network and see some of the other sights, resorts/towns and attractions.
Monte Torro is the highest point on the island the name most likely coming from the Arabic, al-tor, meaning highest mountain. Though not a mountain it is worth a visit if you have a hire car for the stunning views ( particularly in spring when you can see over the length of the island) There is a pleasant Bar Restaurant Sa Posado del Toro at the top with inside seating and an open terrace with views to the south. Monte Toro is signposted from Es Mercadal in the dead centre of the island along the ME-1. El Toro in Catalan or Monte Toro in Spanish has viewing areas to take in the views to the north and west. Can also be walked along the good access road as is 'only' 350 meters high.