One of the most beautiful cities in the world, Rotorua on New Zealand's North Island is surrounded by as many as 16 lakes. What it is renowned for, however, are the mud pools, geysers and the smoke snaking out of its ground. The city is based on top of an active volcanic zone and is enveloped in a weak sulphur smell. Nicknamed the Sulphur City, Rotorua is a heaven for vacationer – possessing just about every type of activity a tourist could ask for. Yet for the people who wish to pull this off