Autumn day trip from Athens to Parnon with the SWEN hiking group. One-way hike Prastos – Mazia Gorge – Kastanitsa: from Prastos, the old capital of Tsakonia, an old path that linked the two Tsakonian villages descends to the Mazia Gorge through fir, pine and plane forest, then climbs through chestnut woods to Kastanitsa. About 3.5 hours including stops, +440 m / -300 m, on forest and stony paths with descents and climbs. Grade 1+/5 (moderate, good fitness required). In Kastanitsa, plenty of free time at the 42nd Chestnut Festival, with roasted and boiled chestnuts, traditional recipes, local products, music and dancing; return to Athens in the afternoon. Coach boarding points: Syntagma (metro stop on Vasilissis Amalias Ave.) 07:00, Omonia Square (outside Hondos Center) 07:05, Palataki stop in Chaidari 07:20, VIEH stop in front of Praktiker Hellas in Elefsina 07:30, Canal Souvlaki at the Isthmus of Corinth 08:15. Return 21:45 at Syntagma Square. The price includes private coach to and from Athens, programme planning, experienced hike leaders trained in first aid, a fitness instructor, a group first-aid kit, hiking equipment and VAT. Food is not included. A 10-person group ticket is also offered. Ages 12 and over (minors with an adult); good fitness required. Bring hiking shoes with a good non-slip sole, trekking poles (especially useful on the descents and climbs), a backpack, comfortable sports clothes, a windbreaker or waterproof jacket, a hat, sunglasses, swimsuit, sunscreen and at least 1.5–2 L of water. Tickets online by card or PayPal through Eventbrite or on the trip page, or by bank transfer after filling in the form on the page or emailing hiking@swentravel.com to confirm availability. No cash sales on the day. Cancellation: up to 14 days before, full refund or a credit voucher of equal value valid for 1 year; 7–13 days before, 50%; 4–6 days before, 25%; less than 4 days before, nothing. Name changes up to 1 day before (Mon–Fri until 16:00) by email to hiking@swentravel.com, €7 per ticket. In bad weather or for other safety reasons the trip moves to a new date or is cancelled with a full refund. Participants get a detailed email 1–2 days before (boarding point choice, weather, latest updates). Info: (+30) 6947687677, info@swentravel.com.