Half a dozen operators run boat trips from the Armacao seafront eastward along the cliffs to Benagil and back. A typical "Cave Cruise" lasts an hour and a half and threads in and out of a dozen sea caves, including the famous skylight cave at Benagil and several arches and grottos the larger boats cannot enter.
Smaller RIB and dolphin-watching boats are also available and usually go further offshore. Tickets are sold at booths along the seafront for €20–35 per person depending on the boat and the season; prices drop sharply outside the summer peak.