• Free entry some Sundays: the first and third Sunday of each month from November to March, plus a handful of national dates
• Last entry 20 minutes early, and winter hours end at 3pm, so aim for a morning visit from November to March
• About 7 minutes on foot from Acropolis station on metro Line 2, with trams and buses stopping nearby too

The ruins of one of the largest temples of the ancient world, begun around 515 BC and finished by the Roman emperor Hadrian more than 600 years later. Of its 104 marble columns, 15 still stand, each almost 17 meters tall. A 16th lies on the ground where a storm brought it down in 1852.

The site sits between the Acropolis and Ardittos Hill, by the old Ilissos riverbed.