Athens, Alimos marina

Alimos Marina — also known as Kalamaki — holds the title of largest marina in the Balkans, sitting about 15 km southwest of central Athens and just 8 km from Piraeus. With hundreds of berths and solid facilities, it's a serious base for exploring the Saronic Gulf. The vibe blends working harbour with easy access to Athens, meaning you can tie up and be in the city or at a seaside taverna within the hour.