Before diving into specific areas, it helps to understand the structural categories you will encounter across Taiwan.

Private rooms（湯屋） offer a personal or couple’s pool in an enclosed space, typically for 60 to 90 minutes. Standards range from small tiled boxes to elegant hotel suites. This is the most accessible format for visitors who are uncomfortable with communal bathing, and it is also the dominant format in resort-style hot spring hotels. Pricing varies enormously.

Public mixed-gender pools（大眾池） require swimwear and, at many venues, a swimming cap. These tend to be outdoor or semi-outdoor facilities with multiple pools at different temperatures. Atmosphere is casual and social. Some locations — particularly certain public baths in Beitou — have specific rules about the style of swimsuit permitted, so checking in advance is worthwhile.

Gender-segregated nude baths（男湯 / 女湯） follow the Japanese onsen model more closely. Men and women enter separate facilities, swimwear is not permitted, and bathing nude is the norm. If you have not experienced this before, the prospect can feel daunting; in practice, it is simply functional and unremarkable once you are inside.

The universal rule across all formats: shower thoroughly before entering any pool. This is not optional, and regulars enforce it.