You can't help but notice the fragrance, the park is 8.5 acres filled with 100s of different lilacs. If there's even a slight breeze during bloom time, you can smell the lilacs driving before you even get close to the park.
I had to look up how many lilacs out of curiosity, the count ranges from 700-1500 lilacs of 200-300 different varieties, along with 35,000 tulips that bloom the same time, and over 400 other trees, shrubs and perennials. Fragrant doesn't do it justice in spring.