The hot springs are a must if you find yourself in Taipei. The water in the Beitou hot springs is healing and anti-cancerous and said to be some of the only of its kind in the entire world (aside from some springs found Japan and Russia). The new "xinbeitou" line will get you directly to the hot springs and from there it's just a short, little walk. The hot springs are outdoors and set on a 3 level tier. The very top tier has the hottest of the springs while the bottom is a lukewarm. There are also two cold pools as well. A wonderful place to unwind and relax. Loved the atmosphere and natural environment.
There are a few locations in Taipei if you enjoy dipping in hot spring and Beitou Springs is one of them. There are public outdoor dipping sites and a number of private ones within the resort hotels where you can pay for the use of the private baths. Note: You may not be allowed clothing for some of the private ones due to the nature of the spring water.
Forget about expensive Spa massages (well a Spa is still pretty cheap in Taipei^^) and get on the MRT up to Danshui and make sure to change the train in Beitu for the Xin Beitou MRT station. The hot springs are right next to the station and offer your 3 different pools. If you don't have a swim suit you can actually buy one over there. Take your time to relax, it is so worth it
Right off the Xin Beitou MRT station, Beitou hot springs is right next to the Hot Spring museum. This is my only hot spring experience so I can't really compare it to other springs, but for a first time it was a really fun and relaxing experience. There are three levels of pools, hottest being on top and cooler towards the bottom. In addition to the hot springs, there are cold water pools to the side where you can cool off if it gets too hot for you. Don't have a swim suit? No worries, they sell suits there for pretty cheap. As well as popsicles made from hot spring water. (Not the same water the people sit in of course) After my time soaking, i felt really refreshed afterwards. Highly recommended!
Chuan Tang. One of the best
Go check out the Thermal Valley- steamy and smells like rotten eggs