Thanks to its distinctive nutty flavor and ability to melt smoothly, Gruyère is one of Switzerland’s most popular cheeses. By law, in order to bear the name, this hard, cow’s milk cheese can only be produced in or around the town of Gruyères in the canton of Fribourg. Cheese-makers in the region have been churning out this prized product since 1115. While most factories prefer to make their cheese behind closed doors, La Maison du Gruyère opens up the process for visitors. Inside the small museum, which offers both guided…