TheOneToGo
A great thermal bath visit here means soaking in genuinely hot mineral water inside a grand Neo-Baroque palace, where the building itself is as much the draw as the pools.
Our pick
The neo-Baroque outdoor pools, the chess players floating on wooden boards, the steam rising off yellow-tiled indoor halls on a winter morning: this is the version of Budapest's bath culture that stays with you. You spend the day moving between pools at different temperatures, thawing out in the steam rooms, and surfacing into cool air before sliding back in. The depth of the crowd, the sheer scale of the complex, and the full-day format make it a more satisfying immersion than any of the smaller or newer alternatives.
If our pick doesn't fit
Lukács is smaller and noticeably less crowded than Széchenyi, at a lower price, though it lacks the grand outdoor pools.
Soaking in a beer-infused pool at Lukács is a quirky alternative, though it is a shorter session rather than a full day.