Asklepion of Hippocrates Zia and Asfendiou Antimachia Castle Paleo Pyli Kalymnos — the easy foot-passenger hop Nisyros — the working volcano day trip Pserimos, Symi and Patmos Kos Day Trips & Island Hopping: FAQ A hire car is the right tool for Kos's mountain villages and castles, and the wrong tool for crossing to Kalymnos, Nisyros or Bodrum. This guide separates the paved self-drive routes from the trips where you leave the car at the port. Kos rewards a rental car on land and punishes it at sea. The island's headline sights — the Asklepion of Hippocrates, the sunset villages of Zia and Asfendiou, the Knights' castle at Antimachia, the abandoned acropolis of Paleo Pyli, and the ancient capital at Kefalos — all sit on paved roads that a basic economy car handles comfortably. But the moment a day trip involves a ferry to Kalymnos, the Nisyros volcano, or Bodrum across the strait in Turkey, the calculation flips: Greek rental contracts void every insurance tier during sea transport and ban cross-border travel entirely. The practical rule for visitors collecting a Fiat Panda, Hyundai i10, Kia Picanto, or Toyota Aygo at Kos International Airport (KGS) is simple: use the car for the inland loops, and travel as a foot passenger for the islands. The sections below give the drive times, surfaces, entry fees, and parking for each self-drive stop, then the same-day ferry windows for the islands worth visiting — and the ones that only work as overnight trips. For the detailed road rules behind these drives, see our driving in Kos guide These five stops form two natural loops from Kos Town: an eastern half-day pairing the Asklepion with the Zia sunset, and a longer western run linking Antimachia Castle, Paleo Pyli, and Kefalos. Every approach below is sealed asphalt with free or low-cost parking, so a small hire car is all you need. Asklepion of Hippocrates The Asklepion is the easiest major site to reach by car: about 3.4 km southwest of Kos Town through the suburb of Platani, with a free paved car park at the gate and no off-road risk. The ancient healing sanctuary climbs three terraces to a 2nd-century BC Doric temple. Reported 2026 fares range from roughly €8 for a single-site ticket (about €4 reduced) up to a €15 combined pass covering the Roman Odeon and other Kos sites — the figure genuinely varies by source, so confirm on the official e-ticket portal (hhticket.gr) or at the gate. EU citizens up to 25 and non-EU visitors up to 18 enter free. Summer opening runs to about 20:00 from April to August, shortening to roughly 08:30-15:00 in winter. Zia and Asfendiou Zia, the best-known of the Asfendiou villages on the slopes of Mount Dikaios, is the island's premier sunset spot, about 15 km and 25-30 minutes from Kos Town. Two paved routes climb to it — the direct approach via Zipari with tighter hairpins, and a gentler scenic ascent through the forest — but both are narrow and largely unlit, so the post-sunset descent calls for slow, careful driving. Park in the free lot at the village edge; the cobbled lanes above are too narrow for cars and roadside parking is banned. In July and August the lot fills fast around sunset, so arrive before about 17:00 or plan to leave after the crowds thin. Pair the Asklepion with Zia for a half-day eastern loop — the sanctuary in the cooler morning, lunch or sunset in Zia. The drive between them runs through the Dikaios forest on sealed road. Antimachia Castle The 14th-century Castle of Antimachia, built by the Knights of St John, sits on a plateau about 23 km from Kos Town near the airport. Turn off the main island road at the army base (marked by a tank); the paved road becomes a short track that low-powered rentals manage easily, ending at a free car park by the walls. Entry is free — there is no staffed booth — and the site is open from morning to roughly sunset. Its place in island history is the siege of June 1457, when a garrison of 15 knights and about 300 islanders held the castle for 23 days against an Ottoman force of 16,000, who finally withdrew. Paleo Pyli Paleo Pyli, the abandoned 11th-century Byzantine acropolis sometimes called the "Mystras of the Dodecanese," lies about 16-18 km from Kos Town above the modern village of Pyli. Founded by the monk Christodoulos — who went on to found the Monastery of St John on Patmos — and later refortified by the Knights, it was abandoned around 1810-1830 after a plague.