"Freibad" is the term most commonly used in Germany to refer to an outdoor public swimming pool. Even though that literally translates as "free bath," you nevertheless have to pay admission. Other names include "Sommerbad," in reference to the season they are open, "Waldbad" can be used when the swimming facilities are surrounded by a forest, a "Kombibad" combines both an outdoor and indoor pool.

In most swimming pools, you won't need your own lock to secure your personal items, as changing facilities are usually equipped with lockers that work with a coin-return system. They require a deposit of a €1 coin that's returned when you unlock it. In many places, you also need 5 or 10-cent coins to use the hairdryer.

You are expected to briefly shower before going into the pool to wash off perspiration, excess sunscreen and other body wastes. Most people use soap and shampoo when they shower a second time after swimming, to get rid of the various chemicals of the chlorinated pool. Showers are often collective, and people take off their bathing suits to wash.

For most Germans, flip flops are a must at the swimming pool. Although they are not obligatory, you'll definitely need them if you don't feel like walking barefoot around the pool. If you try doing that with regular sandals, you could be warned that "Strassenschuhe" ("street shoes") are not allowed.

It's generally prohibited to jump from the edge of the pool — check for signs. Diving platforms and springboards are among the regular features of the "Freibad," but sometimes their access is restricted; lifeguards are in charge of managing them.

You'd be lucky to find a pool this empty on a hot summer day, so if you're into swimming laps, it can be frustrating. People from other countries who are used to having lanes reserved for fast swimmers often complain about how unsystematic Germans are in this aspect. Indoor pools are definitely emptier in the summer and are an option if you want to swim without bumping into others.

Children wearing swim aids are not allowed in deep pools, even in the arms of an adult. Kids must pass a test known as the "Seepferdchen" ("seahorse") to be considered swimmers. But that doesn't mean they can be let out on their own in the wild water action. Parents from the US have noticed that lifeguards appear to have a relaxed approach in Germany; keep your eyes on your kid at all times.

Different pools allow people to bring their personal swimming pool toys, but this varies from one location to the other, so you need to check before inflating your pink flamingo mattress. When the pool is really full, huge toys are more of nuisance than anything else.

Even if some Germans like to swim naked in lakes, it's prohibited in public pools. You can't jump into the water in your underwear either — it needs to be a proper swimsuit. As for the burkini, since it's made out of swimsuit material, it's a legal option for Muslim women. However, that doesn't protect burkini wearers from racist comments. Every year, local attempts to ban it also make headlines.

The term "Freibad" actually refers to the outdoors, "im Freien." Germany's swimming facilities are not just pools of concrete, they are often surrounded by lawn where people relax under the shade of trees. Some women might tan topless, which is tolerated in some pools, not all. Photos are not allowed.

Hours spent chilling between the pool and the lawn are an obvious invitation to picnic. Glass bottles are usually prohibited, as well as glass-made hookahs. If you didn't manage to pack a lunch for the day, there are usually snack bars on site. Classics at the pool: "Pommes" ("french fries") and "Eis" (ice cream). But don't eat right by the pool — nobody enjoys a soggy fry.