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.