The Baths of Antoninus, in Carthage, Tunis Governorate, are an ancient thermal site where the water reaches 38°C. An indoor bath and sauna today continue the site's Roman bathing tradition.
Insider tip — The Thermes d'Antonin are the ruins of the largest Roman baths in Africa, built under Emperor Antoninus Pius in the 2nd century AD on the Carthage promontory overlooking the Bay of Tunis. The complex once covered over 35,000 square metres and served the Roman capital of North Africa with sea views that remain spectacular today from the preserved platform. Though no longer functioning as active baths, the site is a profound testament to Roman hydraulic engineering and the thermal bathing culture it exported across the Mediterranean. Visit late afternoon when the columns cast long shadows over the sea and the light turns amber.