The best things to do in Skiathos by car centre on sights the island bus barely reaches. Evangelistria Monastery, 5 km north of Skiathos Town, was founded in 1794 and is where the first flag of modern Greece was woven in 1807; it opens 08:00-12:00 and 16:00-20:00, the courtyard is free and the museum costs 2 euros. Kastro, the medieval fortress at the island's northern tip, is a 25-35 minute drive: 12 km of paved road to Panagia Kardasia, then a rough dirt track to a parking plateau, and a 500 m walk to the ruins. Under the 2026 Greek Road Traffic Code (Law 5209/2025) fines follow the driver, urban streets are limited to 30 km/h, and illegal parking can cost 20-80 euros plus on-the-spot licence-plate removal; park free at the New Port, Sommia/Acropolis or Cemetery lots and arrive by 18:30-19:00 in summer. Lalaria beach has no road access and is reached only by boat from the Old Port, often cancelled by the Meltemi wind. Xanemos beach and the airport perimeter offer dramatic low-altitude plane-spotting, and there is no fuel in the rugged north, so fill up before leaving the south coast.