Travelling is a very good activity. When you are fed up with your work and study, and when you can get a holiday, you can go to the beautiful spots to enjoy the beauty of nature and the special character of other cities. You can breathe fresh air, meet different people and make friends with them. In so doing, you will forget your tiredness and troubles and build up your health. As a result, you will feel fully relaxed and you will have the energy to undertake the new tasks waiting for you. But sometimes, travelling is not an enjoyable thing. For example, when the bus or car you ride in has an accident, you just sit in it and waste your precious time. Furthermore, the weather can be changeable. If you are climbing a mountain, it may rain suddenly. You may be caught in the rain and may catch a cold. The worst thing is that you may have your money stolen and you may have an injury. All these are terrible things which can happen to a tourist. Therefore, when you are going on a