Cairns Discovery Tours (tel: (07) 4053 5259; website: www.cairnsdiscoverytours.com) offer half day tours of Cairns and its surrounds with a focus on natural history. My Town Tours (tel: (07) 4033 2095; website: www.mytown.net.au) give shorter tours with a more historical focus. Alternatively, the Cairns Heritage City Walk and Southern Heritage Drive leaflets, available free of charge from the Gateway Visitor Centre on the Esplanade, allow visitors to self-guide themselves around Cairns and its surrounds. Bandicoot Cycle Tours (tel: (07) 4055 0155; website: www.bandicootbicycles.com) provide small-group, fully-escorted cycle rides through the rainforest hills above Cairns, and give participants the chance to swim in a volcanic crater lake.