Greece is a small country located in southeast Europe, with a mainland that is very mountainous and hundreds of small islands in the Aegean and Ionian Seas. The largest island is Crete in the Mediterranean Sea, and the highest mountain is Mount Olympus. Athens is the largest city and capital of Greece, with a population of over 3 million people. Ancient Greece included mainland Greece as well as areas that are now part of Turkey, and Greek colonies scattered around the Mediterranean coast from Italy to France.