Not the easiest sight to locate in Barcelona (behind the Cathedral, down a side street and inside a modern-day building), but the first-century temple dedicated to Caesar Augustus is a relic well worth the quest. Four tall Corinthian columns stand somewhat incongruously on a podium, stirring up scenes from ‘Barcino’s’ distant past as a Roman colony. The ancient Temple of Augustus stood very close to the present-day civic square of Sant Jaume, and with the columns still in remarkably good nick, is a fascinating detour for history lovers exploring the city’s Gothic quarter.
There are only four pillars left. It's not worth looking at. Fortunately, no tickets, just north of St. Jomee Square, you can stop by.