La Sagrada Familia (Church of the Sacred Family)

From 1882 up until his death in 1926, Art Nouveau master Antoni Gaudí devoted himself to the construction of La Sagrada Família (Church of the Sacred Family), a towering Gothic-style-with-a-twist church in Eixample. And even then, he was unable to finish; Gaudí was known for saying "My client (God) is in no hurry."

Even if you're not all that interested in architecture, you're sure to find this church -- like Gaudí's other work -- a feast for the eyes. Easily recognized by its spider-like buttresses, this monstrous church is, as Frommer's says, "literally dripping with symbolism." While you're here, be sure to check out the Nativity Façade, but give your eyes a moment to take in all the detail, from the obvious portrayal of the Holy Family to the intricate carvings of numerous religious images. La Sagrada Família's interior is just as beautiful, from the smooth stone columns to the intricate stained-glass windows.

La Sagrada Família -- which sits north of central Barcelona -- is not hard to spot thanks to its spires, which stand an extravagant 558 feet high. You can take a quick peek for free, but you'll have to pay admission (about €12, or $15 USD) to go in and explore. Consider purchasing a combination ticket that allows entry to both La Sagrada Família and the Gaudí House Museum (located several blocks northwest near Parc Güell) for the equivalent of $18 USD. You are allowed to attend services, but you will have to pay a bit extra. The church opens its doors at 9 a.m., but closing times depend on the season. Hours also vary depending on service times. For more information, check out La Sagrada Família's website.