The best way to get to the Sagrada Familia, is by taking the L2 or L5 line to Sagrada Familia Station. Every exit guides you towards cathedral, just on a different side. Depending on what time you've still got, take a wander around the cathedral and observe all sides. When you're back at the front, take a little walk towards the park for a full picture, cause it's a really tall structure. After you've taken enough unobstructed selfies, walk to the entrance at the right af the basilica. To enter past the gates, you will be asked to show your passport and ticket. Once behind the gates, you can store away large items such as strollers and possible suitcases in a designated area. Done, when you're alone or in a small group, stay right, where you'll be guided towards a security check. In my idea the same as an airport with the gates and the baggage scanners. Now for the last part, you'll have to scan your tickets at a turnstile gate to be let through to the basilica. 

Once you're finally inside, you can wander around, have a look at the ceiling, the glass in the lead window designs, and the intricate pillars, upholding the impressive structure. Once done looking inside, you can head out at the opposite side from where you entered, and have a upclose look at the facade. Going right, under the cathedral are the exhibition, gift shop, and toilets. 

Basilica de la Sagrada Familia, was initially designed by Francisco de Paula del Villar in 1883. A year after the first stone was laid, did Antoni Gaudi take over. He continued the build in a modernist way instead of the traditional neogothic style. After Gaudi's death in 1926, the build continued, in yet again a different style, because most of his drawings and designs had been destroyed during the Spanish Civil War.

The Nativity facade and the Crypt were declared as a UNESCO World Heritage Site in 2005. It's registered under the 'works of Antoni Gaudi among some of his other works, such as Casa Battlo, and Park Guell.