Cerro Santa Lucia
If you are looking for some green space in the city then head over to Cerro Santa Lucia. This park offers an urban escape where you can spend the hours quietly reading, writing, or people watching. Just a note here, Chileans use parks as make-out spots, so don't be alarmed to see a lot of necking going on. Cerro Santa Lucia sits at the southern end of Barrio Bellas Artes. The park basically consists of a hill and at the top of the hill sits a fort with a looking post which offers great 360° views of the city.
There are two main entrances into the park, one on the southern end and the other on the northern end. As you enter the park you will be required to stop and sign in with a park official. The purpose of the sign-in sheet is to deter thieves from entering the park, and it works. Once inside the park you will find many places to sit and relax, along with some vendors selling drinks and snacks. Walking around you can't help notice the fort and how intimidating it would have been if you were an attaching army. Lucky you are not, so enjoy the many shade trees and fountains.
If you plan on going to Cerro Santa Lucia, I would recommend entering the park at the southern entrance. At this entrance you will be greeted by a very large and ornate fountain which is a popular place to have your picture taken. Next wonder through the park and defiantly head to the top of the fort and to the looking post to get the great views of the city. Continue through the park until you exit on at the northern entrance. Once you exit you will be right in the middle of Barrio Bellas Artes, where you will find numerous cafes and restaurants lining the streets. Nothing finishes off a trip to Santa Lucia Park like a café cortado and some lively conversation at a sidewalk cafe.