Time Out says
It’s the highest point of Lisbon and it’s better than a city map, with a tile panel that allows you to locate the main monuments. From here, you can see all the way to Lisbon’s downtown up to Avenidas Novas, it’s one of the less visited viewpoints and one of the most romantic. Are you going to have a baby? If you have the chance pray in the chapel: legend says it guarantees tranquil childbirths.