Szechenyi has the most indoor and outdoor pools out of all the baths and spas in Budapest. The pools range in temperature - there is usually a sign posted nearby letting you know the temperature before you get in. The sign often even tells you a time range of how long to stay in.
Our tour guide the day before on the walking tour said that people can get a prescription from their doctor for the baths and then get a large discount on the entry fee!
I read a bit about visiting the baths before going on the weekend trip. I'm glad that I packed a camping towel and flip flops (as well as, of course, a swimsuit). My favorite were definitely the outdoor pools.
The buildings were stunning. I love the yellow buildings with while columns against the blue/green water.
The pool shown below even had a whirlpool built in!
A couple of the indoor pools are shown below. Each room was different.