It is true that this fort is not so big and that there is not so much to see inside but on the other hand it is really well preserved and dating back to the 17th century it is quite old which for me allways adds to the experience. On the roof you can make some nice pictures and enjoy... 更多
This fortress dates back to around 16th Century - it is in the sea, but also close to the mouth of the Douro River. The watchtowers are great and there is a military museum within.
Someone was charging 0.50€ at the entrance, but I am not sure how legitimate he is. The view is not particularly different from outside. This place takes less then 10 minutes to visit, but more than an hour to get there (from anywhere...) You get to use the toilet, though.
Visiting Porto with a litle more time, this is a place you should visit. It´s well located, near by the beach of Matosinhos and the rocky beaches of Porto. The entrance it´s not free, but you woul have the chance of visiting some things left behind from the portuguese army.
nice spot, close by matosinho surf point, view to the harbour, but poor infrastructure, a small shop, no coffee house, and you have to pay a symbolic entrance for a symbolic visit
We visited on a gusty, rainy day in February - the rooms within aren't terribly interesting (or very numerous), a curiously motley collection of bullets, medals, etc. in one room, and local art for sale in another (?), but it was great to be able to explore the upper level and parapets outside, and the 2 Euro entrance fee was... 更多