Go inside. It’s worth it. The light is beautiful, and the architecture rewards unhurried attention. Take your time to wander, don't rush.
One hundred and fifty years in the making, and still unfinished. The two completed façades serve as the "secondary" entrances; the main entrance is yet to be built. Completing the project will require demolishing four city blocks, a plan that is controversial and complicated because people live there. Many of those residents bought at lower prices with a clause acknowledging this; when the Sagrada Família is finished, they will have to leave.