Shower (bathroom facility) – la ducha
To remember that shower is pronounced doo-chah (ducha) in Spanish, use the following mnemonic:
In the Cuban hotel room, there was a notice on the shower saying: "Please don't do the cha cha (ducha) in here". But some guests took no notice...
Ducha is feminine, so it's la ducha. Imagine ladies dressing up as showers: