The minute you step off the boat, you get a sense of how small Isla is. The sights and properties on the island are strung along the coasts; there's not much to the interior except the two saltwater marshes, Salina Chica and Salina Grande, where Maya inhabitants harvested salt centuries ago. The main road is Avenida Rueda Medina, which runs the length of the island; southeast of a village known as El Colonia, it turns into Carretera El Garrafón. Smaller street names and other address details don't really matter here.