For 1000 pesos (£1) you can take a 30-minute boat trip around the harbour. On sunny days, you get beautiful views back to the city and the hills.
You also get about as close to a fully functional port as you will anywhere in the world and get to see a dry dock and the local battle ships up close and personal. If you're lucky, you'll see sea-lions sunning themselves on the decks of fishing boats that they have commandeered. For 10,000 pesos (£10) you can hire a whole boat for yourselves.
Muelle Prat, down by Plaza Sotomayor
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