The white chapel perched on its sea-battered rock entered global consciousness in 2008, but Agios Ioannis sto Kastri has anchored the northwestern coast of Skopelos since the seventeenth century. The 110 steps carved into limestone brought monks to vigil long before they carried film crews and tourists. Skopelos itself remained a quiet pine-scented island in the Northern Sporades until a single Hollywood production recast it as the emblem of Aegean escape. Today the skiathos to skopelos boat trip mamma mia remains the principal route for visitors threading the fifteen nautical miles between the two islands, a passage that reveals the volcanic geology and marine-park waters of the archipelago. The journey crosses open Aegean before entering the sheltered bays that define Skopelos. Kastani Beach, the film's primary location, faces west beneath cliffs draped in Aleppo pine and kermes oak. The sand is coarse quartz mixed with shell fragments; the water clarity owes to the absence of riverine sediment and the protection afforded by Greece's National Marine Park of Alonissos and Northern Sporades, established in 1992 to safeguard monk seal colonies and seagrass meadows. Most island-hopping cruises include Alonissos as a third stop, extending the route to encompass traditional villages built inland as defense against Ottoman-era piracy. Skopelos retains working almond orchards and plum groves that supplied the island's historical export trade. The stone houses of Skopelos Town climb in tight terraces above a harbor lined with plane trees planted in the nineteenth century. Agios Ioannis chapel, though modest in scale, commands the most dramatic coastal perch in the Sporades: a 25-meter limestone promontory separated from the shore by a narrow rock bridge. The structure was renovated in 2008 for filming, but the ascent and the exposure remain unchanged. Wind accelerates around the headland, and the steps are uneven. Departures for the skiathos to skopelos boat trip mamma mia leave from Skiathos Old Port throughout the navigation season, which runs from April through October. Vessels range from traditional caïques to modern sailing yachts. Crossing time depends on sea state and the number of intermediate stops; most itineraries allocate six to eight hours for the round trip, allowing an hour ashore in Skopelos Town and shorter intervals at beach anchorages. The route offers no shelter in open water, and summer meltemi winds can produce steep chop in the afternoon.