Underline the topic sentence of the following paragraph. Travelling to a foreign country is a lot of fun. While relaxing and enjoying yourself, you can also learn about the country that you are visiting by exploring a National Park or visiting a famous landmark. A National Park is a protected area where you can see animals and plants in their natural habitat. Great examples are the Kruger National Park in South Africa and the Akan National Park in Japan. A landmark is something historically important that the local government of a country looks after like the Empire State building or the Great Wall of China.