Stavros Niarchos Park
Home to the Greek National Opera and the National Library, this cultural hub is surrounded by tree-lined paths perfect for jogging and cycling. These trails lead to a vast central park that is ideal for picnicking, playing football or doing some yoga stretches. The park also has a network of canals where you can splash about in a kayak in summer and a green space on top of the opera house with panoramic views. Look out for the yoga workshops, film screenings and other (often free) outdoor events that are held here in summer.