Nice to see. We bought tickets online in advance. It is definitely recommended. You don't have to wait for a few hours, you definitely know you have a ticket. The moment we arrived, we were able to walk directly. However, if there is no paid part, you can see a lot. In the paid part, it is very busy, so you always have to pay attention that you can only get the best things with other tourists in the photos
I was dissapointed after walking all the way up there and finding out that you had to buy a ticket to get into a park! I get it that you have to pay to get into Gaudi’s house and stuff but a park?! plus, there were no tickets left. I recommend you buying your tickets in advanved if you want to get in. however views from the city were great! You can walk around the park but not get into the actual park, where all the cool sculptures are without a ticket.
Amazing place to spend the day. Whether you're admiring the architecture, gardens, or the environment, you are bound to have a great time here.