"The importance FC Barcelona soccer club has in the city can be felt in the noise of its home stadium, the Camp Nou. At 99,354, it’s the biggest in Europe—and there's an expansion plan in place to push it to 105,000. All seats are actually owned by season-ticket holders, who then release them to the public if they can’t go. Don’t worry: it means there’s usually a good chunk available, especially against lower league teams, and 72 to 48 hours before a match. Barcelona’s home matches in La Liga—the Spanish soccer league—usually run from mid-August to the end of May, and tours of the stadium and the FC Barcelona museum are still kicking off (from €28 or $30.50). Glimpse Messi’s trophies, the players’ tunnel, and the first team’s bench." - Gemma Askham