Vilamoura Glass Bottom Boat Cave Tour: Explore Xorino Cave & the Algarve Coast

Vilamoura Glass Bottom Boat Cave Tour runs along the southern Algarve coast from Vilamoura Marina in Quarteira, Faro, Portugal. This four-hour excursion departs from Vilamoura Marina, office number 10, Algarve Seafaris; guests should arrive 30 minutes before departure. You begin by following the Dolphins Route, skimming turquoise shallows that expose schools of small fish and rocky reefs, until you reach the Xorino Cave. There the crew transfers you to a glass-bottom vessel that slips into narrow grotto mouths so the seafloor appears beneath your feet - a rare vantage that reveals marine life in shallow water and the pale, wave-sculpted limestone that shapes the Algarve's coastline. The boat takes you through a sequence of caves and arches, past honeycomb cliffs and weathered pillars, offering close views of the pocket beaches and rock formations that define this stretch of coast. Along the return trip the captain runs a slow loop to show the cliff faces of Albufeira old town and Albufeira new town, and to point out fishing hamlets and the carved ledges where fishermen once moored. A swim stop gives a chance to cool off in calm coves; floating above the clear shallows, you can watch fish flicker under the glass hull. Music and local stories from the crew add color while keeping the experience informal and friendly. This outing occupies a unique place in Algarve recreation because it combines accessible interpretation - the crew describes geology and local maritime life - with the proper small-boat scale: maximum group size is 20. The coast here is primarily limestone and marl, eroded into caves and arches by Atlantic surf; that geology produces the bright ochre and cream cliffs that photographers prize. The region's fishing traditions and Moorish-era place names linger in townscapes and help explain why the sea remains central to local life. Practical notes: the trip runs roughly four hours, includes a swim, and has limited wheelchair access (contact the operator for accommodations). Children under 16 must be accompanied by an adult. Bring reef-safe sunscreen, a hat, and a light wind layer; waters can be breezier offshore. Respect wildlife by keeping noise low during dolphin sightings and avoid touching marine life or stepping on rock pools. For travelers who value an intimate, instructive day on the water - one that pairs geology, wildlife observation, and the feel of small Portuguese coastal towns - the Vilamoura Glass Bottom Boat Cave Tour is an efficient, memorable window into the Algarve's dramatic shoreline. Bookings typically run in morning and late-afternoon departures; the operator provides a full refund with 24 hours' notice or in extreme weather, and the small-group format preserves an intimate, interpretive experience rather than an anonymous, overcrowded cruise. Book early online.