Los Arcos is a boat-only reef and wall dive north of Pared Verde on Playa del Carmen's offshore line, known for a pair of arches, sandy sections, and a route that starts in blue water before joining the reef. Teams usually dive it as an advanced drift, moving with strong south-to-north flow along the wall and back onto the plateau. Expect schooling fish, moray eels, groupers, stingrays, turtles, and other reef life rather than a sheltered beginner profile.