Argiroupoli Springs boasts a huge diversity of plants and animals. Hike along the trails and if you're lucky, you may come across some fascinating critters.
You're spoiled for sightseeing choice when visiting Rethymno. Argiroupoli Springs is a great place to start here, but there are loads of other worthy sights to explore. Georgioupolis Beach, Lake Kournas, and Lake Kournas are not far from the biodiverse ecosystem and and will cap off your day nicely.