To reach at this secret location, go to Japanese garden in Vasco. It's a children's park. Cross that and you will find a stairway going to a beach. It's a long stairway but with view that breathtaking, it's worth every step.
The beach is clean, you can see blue tinge in water. Very few people visit it. There are no hackers, no shacks. The beach is best if you wanna enjoy a quite evening.