The 'Tower of Hercules' sits near the windy northern tip of the city. Legend attributes its construction to one of the labours of Hercules, but it was actually the Romans who orginally built this lighthouse in the 1st century AD – a beacon on what was then the farthest edge of the civilised world. Climb the 234 steps for great panoramas of the city, coast and the surrounding Parque Escultórico (Sculpture Park).
The exterior facing of the 59m-high stone tower was added in 1788–90, but the inside, apart from the staircase and cupola, is all original Roman. Buses 3 and 5 run here from Paseo de la Dársena near Plaza de María Pita.