Time Out says
It’s one of Lisbon’s best gardens for eating outside. There are trees everywhere and two picnic areas, one of which is equipped with a barbecue. In case you don’t feel like carrying a basket, there is also a kiosk with great “tostas mistas” (ham and cheese sandwiches) and tea. Sometimes DJs play music there. Kids usually have a blast at the park’s playground. This is also a good spot for exercise buffs: there’s a fitness circuit and a bike lane along the park.
Open 24 hours.