Swimming is healthy. It is one of the most popular physical activities practices by people who are trying to keep in shape. Swimming can also make a great hobby. It is pleasant to swim in rivers, lakes, seas and oceans. If you live in a city, you can practice swimming in a swimming pool. People whose main interests are swimming and travelling can combine these two. However, one should always remember that there are a couple of places where you should not go swimming.

1. Beqa Lagoon, Fiji
Do not expect to find a real-life paradise in Beqa Lagoon. The area looks splendid indeed. The waters are always clean and clear and the sands are warm and snow-white. But you should never trust this relaxing view. It is full of bull sharks. Another species of sharks that makes this area dangerous for swimmers is the tiger shark. A huge number of this type of predators gathers there every year. If you go swimming there, you significantly increase the chances of being attacked. Forget Beqa Lagoon and look for a more secure and safe place where you can enjoy swimming.

2. Citarum River, Indonesia
The Citarum is the name of a river flowing in Indonesia. It is hard to believe that it is a body of water since it looks like a garbage area. However, there is water under the numerous layers of waste and trash. Citarum River is considered to be the most polluted river in the world. In fact, we can say that this river is just a floating garbage dump. Pollution comes from more than 500 plants and factories built on the river banks. It is a sad fact but the locals use the water for cleaning clothes, washing and even drinking.