The Tepid Baths in Auckland are to re-open to the public next weekend, after a renovation costing almost $16 million.
The pools were closed in 2010 over fears about the buildings' structural stability.
The focus of the renovation has been restoring the pools and the building to its appearance in 1914 when the baths opened.
The former ladies' only pool, with hanging flower baskets remains.
An extra lane has also been added to the main pool.
The paint colour, signs, tiling and skyroof have been matched to be the same as those in the original complex.
Auckland Council hopes to get between 250,000 and 300,000 people through the doors over the next year.
The pool will have a grand opening next Saturday and then swimmers will be allowed to take a dip on Sunday.