**** Tarragona, Spain, Roman amphitheatre. Really impressive.Nearly knocked myself out though, too busy looking & hit my head on a stone doorway. Literally saw stars!
Tarragona Costa Dorada | Lonely Planet says: "The eternally sunny port city is a fascinating mix of Mediterranean beach life, Roman history and medieval streets. Spain's 2d-most important Roman site has a wealth of ruins, including a seaside amphitheatre. The town’s medieval heart is beautifully designed, its maze of narrow cobbled streets encircled by steep walls and crowned with a splendid cathedral. A lively eating and drinking scene makes for an enticing stop."