David J.
Yelp
The best preserved part of Roman Tarragona are the walls which still encircle the old town, and a 1.5km section has been landscaped and is open to the public as an archaeological walk.
The lowest layers of the walls consist of large rough-hewn boulders, which survive from the Iberian period. These include two impressive but primitive doorways, which contrast with the more sophisticated Roman walls above, which date from the 3rd century BC and are up to 15m high. This makes them the oldest preserved Roman remains outside Italy.
The walk also takes in a number of the bastions built by the British in 1707 during the Wars of the Spanish Succession, complete with cannons, as well as elements from the mediaeval period. Half way along there is a display housed in several vaults describing the history and development of the walls from Roman to modern times. The walk provides good views over the northern half of the modern city and the hills beyond.
The walls form part of the Tarragona UNESCO World Heritage Site.