If there’s one mandatory visit in all of Barcelona, this is it.

From any high lookout point in Barcelona, you can see the basilica, emerging from the cityscape in all its glory. Antoni Gaudí’s crowning masterpiece features extensive and intricate carvings that are sure to stun. La Sagrada Familia was Gaudí’s lifelong project, but it was only one quarter completed when he died in a tram accident. It’s still incomplete, as evidenced by the cranes and scaffolding on the basilica’s exterior, and it’s not expected to be fully finished until 2026. The inside, however, is somehow even more breathtaking than the outside. Light colored columns branch like towering trunks in a forest, exploding into a canopy of white and red leaves. The interior is illuminated by breathtaking blue and green daisies in stained glass windows. If you were to lie on your back in the center of the nave, the ceiling resembles a kaleidoscope.

C. Mallora, 401; 935 132 060; www.sagradafamilia.cat; open Apr-Sept daily 9am-8pm, Oct-May 9am-6pm, Dec 25-Jan 6 9am-2pm

Individual ticket €15, ticket with audio guide €22, elevator to Nativity Tower €4.50; last elevator to the Nativity Tower 15min. before closing, last elevator to Passion lift 30min. before closing; wheelchair accessible ; reservation recommended