took the ferry to Casilhas (where the statue is), make sure you get on the right one, since there are 2 more boat stops, but neither goes to casilhas. It was only around 2 euro and the trip lasts about 10 mins to get there. you take the bus ( #101) which costs about 1.50 euro and it leaved you at the last stop right in front of the entrance.
There´s no fee and has a beautifull view of lisbon and the european golden gate bridge. there not much else to do up there but i recommend it, to see Lisbon from a diffrent perspective.
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