In 2026, the consensus among visitors to Siam Park in Tenerife is that the Fast Pass is almost always worth the investment, especially if you are visiting during the summer or school holidays. Siam Park is consistently voted the best water park in the world, and queues for popular slides like the Tower of Power or Singha can easily exceed 60–90 minutes. In 2026, the Fast Pass (available for purchase inside the park for about €28) allows you to use a dedicated line for each major attraction once per day (though some premium versions offer unlimited access). If you arrive right at opening (9:30 AM) and hit the big slides immediately, you might skip it, but by noon, the park is usually packed. For many, the ability to ride everything they want without spending half their day standing on hot concrete in the sun is well worth the extra cost. Note that Fast Passes often sell out by 11:00 AM, so it is best to buy them as soon as you enter.