Geography

Greece is a peninsula, which means that it is surrounded on three sides by water. Greece has a lot of smaller peninsulas sticking out from it, which means Greece enjoys many natural harbors. 

Greece is also covered with mountains. They are not huge mountains but if you are trying to go from place to place in Greece, you'll find the mountains a bit of a hindrance. 

Three thousand years ago, it was very difficult to get from place to place in ancient Greece by walking. But it was easy to get from place to place in Greece by boat. 

In the ancient world that grew up around the Mediterranean Sea, the Greeks became known as great sailors. They sailed about the Mediterranean, setting up colonies and outposts where they could.