Note that there are many things to do nearby, it's worth a visit, it's not far, just avoid the crowds.
Value for money: Free, remember there's a Macau Museum nearby.
Fun: Remember to go in and see the introductions and exhibitions, there are many people taking photos. It's recommended to take the side path up, don't try to squeeze in through the souvenir street; the light is softest on the archway reliefs between 5:30 PM and 6:30 PM, making it easy to get around after taking photos.
Scenery: The scenery is quite nice.
The Archway: The facade of the Church of St. Paul's College, Jesuit order (built in 1602, only this side remains after the fire in 1835), the facade of Macau's "World Heritage" site.