April 18 is World Monuments and Sites Day, designated annually by UNESCO and ICOMOS to raise awareness of cultural heritage. In Greece, this means free admission to state museums and archaeological sites across the country, including major Cretan sites such as the Palace of Knossos, the Heraklion Archaeological Museum, and other publicly managed heritage locations. No ticket purchase is required at participating sites on this date. Visitors planning to be in Crete today should take advantage of the opportunity to explore the island's Minoan and ancient Greek heritage without cost. Arriving early is advisable, as free-entry days tend to draw larger crowds than usual. Check each site's opening hours in advance, as times vary by location.