Zea harbor, Maritime port in Piraeus, Greece.

Zea Harbor is a marina in Piraeus, the main port district of Athens, built around a round natural bay that shelters leisure boats and larger yachts. A paved walkway runs all the way around the water, giving a clear view of the moored vessels from every angle.

Themistocles chose this bay, along with Mounichia, for Athens' warship base, and the fleet that met the Aeginetans and later the Persians was built here in 493–492 BC. Its 196 ship sheds, arranged in a fan along the shore, outnumbered those of any other ancient war harbour. The entrance was closed by a chain strung between stone towers 96 m apart.

Locals call this harbor Pasalimani, a name still used in everyday speech more often than the official one. The waterfront is lined with taverns and cafes where people sit outside and watch the boats from their tables.

The marina has 670 berths for boats up to 150 metres long and 10 metres draught, managed by D Marinas Hellas; fuel, toilets, showers and port police are on site. The circular bay is ringed by a paved walkway, with Plateia Kanari and its cafes on the eastern side and the stone clock of Zea at the junction of Lambraki and Moutsopoulou streets.

Below the modern marina floor lie the remains of ancient ship sheds where Athens stored its warships, studied by international researchers since 2001. The work has revealed details about how wooden hulls were built and kept dry more than 2,400 years ago.