Unlike all other complexes, which were built in the Roman Era, the construction of the Greek baths started in the 5th century BC, and more buildings were added with time as needed. The initial structure, built before 450 BC, was only 20 metres long and 4 metres wide, and athletes had to draw water from a nearby well; the adjacent pool, however, was more sizeable and sophisticated, with a surface of 384 square metres, a depth of 1.6 metres, and a fully functional water supply and drainage system. Access was facilitated by five steps on each side, while the floor was paved with limestone slabs.
Later on, one more room with bathtubs was built, while the end of the 4th century saw the addition of a room where even hot water was available. The last significant extension was made in the 1st century BC; during that phase, the last large room was built, together with an arch and a floor heating system called the hypokausta.
The entire complex was probably abandoned as more attractive, functional and luxurious Roman baths were gradually built all over the area. The Kladeos Roman baths took over the site of the pool, while the remaining part was washed away by the river. Today, the Greek baths are not open to the public.