There is a huge bath complex shortly after the entrance to the site, I took many pictures in the several rooms it contained, i.e. the usual caldarium, tepidarium frigidarium and so forth, as well as of the elements of the heating system and raised floor that were visible. On some baked clay stones that raised the floor you could see the marks that identified the maker or the project they were made for.
The baked stones to raise the floor lie everywhere. Some were even used as steppingstones for visitors.