Tai
Google
Very nice experience.
Entrance was free for Portuguese resident, and it cost me 10€ as a tourist.
The whole screams history, if this is the thing you are looking for. There is an area with ancient maps showing how the earth was seen in 1430 to 1460s. And interesting description of parts of the boats.
Nice descriptions of wildlife and plants. Nice labyrinth and grotto with ocean sounds. Amazing pictures.
But please be advised. The walk outside from the entrance until the furthest point and back to the entrance takes approximately 1h30 to 2h00. It is HIGHLY windy, so much that it is difficult to walk and can cause ear pain. Even if in the city it is 30C it will feel like 20C on your walk. The way is done well but I advice you to wear closed shoes. And ladies, please avoid skirts as the wind is so wild that the skirt will be every else and on protecting out private parts (my lesson is learned).
Take a jacket, get some water and put sunscreen because even though it is windy, the sun hits.