Discounts and free admission are widely available for seniors, children and students, often without using a discount card, just ID.
Camping Card International (www.campingcardinternational.com) Up to 25% savings on camping fees and third-party liability insurance while in the campground.
European Youth Card (www.europeanyouthcard.org) Available for anyone up to the age of 30 (you don’t have to be a resident of Europe); provides discounts of up to 20% at sights, shops and for some transport.
International Student Identity Card (www.isic.org) Entitles the holder to half-price admission to museums and ancient sites, and discounts at some budget hotels and hostels. Available online or from travel agencies in Athens (none in Crete) or in your home country. Applicants require documents proving their student status, a passport photo and the fee.