Greece is a country in southeastern Europe with thousands of islands throughout the Aegean and Ionian seas. Due to its geographical location at the crossroads of Europe, Asia, and Africa, Greece has often been described as the bridge between the East and the West world. Athens, its capital, retains landmarks including the 5th-century B.C. Acropolis citadel with the Parthenon temple. Greece is also known for its beaches, from the black sands of Santorini to the party resorts of Mykonos. Due to its highly indented coastline and numerous islands, Greece has the 11th largest coastline in the world, making it one of the most frequented summer destinations with visitors from all over the world.