I love this nature patch in the middle of the city. I pass by it every day on my way to work and run up the hill (its not a real mountain after all) every week (a wonderful trail of about 5K all the way to the top, Highly recommended!).
During the summer and spring you will find a cool drum circle on the foot of the parc (near the statue) called a Tam-Tam.
During the fall this is a place of magic everything turns red and you must take millions of pictures
During the winter people come here to cross country ski, snow show and enjoy the snow.
And thats without mentioning the wonderful views from the top (a photographer dream) the beautiful walking paths, the nice lake at the top, the mid-evil fights and the practicing acrobats (during the tam-tams)...just go there