For amazing views of the landscape, venture up to Bunker del Carmel. See if you can spot any famous landmarks in the distance.
You'll soon find out why this Horta-Guinardo scenic viewpoint is popular with travelers. If you're searching for other things to see here, Sagrada Familia, La Rambla, and Plaça de Catalunya are in this area too. They won't take long to get to from Bunker del Carmel.