Lake Plastiras Thessaly Greece.. In the heart of Thessaly, nestled among the imposing peaks of the Agrafa mountains, lies Lake Plastiras, one of Greece’s most impressive man-made wonders. This serene lake, with its lace-like shores and crystalline waters, is the result of a bold human vision that transformed a barren landscape into an earthly paradise. Surrounded by dense forests of oak, beech, and fir, it offers a magical sight that changes colours with the seasons, attracting thousands of visitors throughout the year.