Archaeologists have uncovered an incredibly ornate 2nd century bath complex in Rome. This is an unbelievably luxurious bath site. Excavations are still underway.
The most famous baths in the world are the Roman Baths in the city of Bath, England. The official website includes an interactive site plan where you can can find out more about the site in ancient and modern times. If you are ever in England, it's an amazing site to visit in a lovely city, not far from London. You can see more photographs of the Roman Baths in England at the Bluffton University Index of Art Historical Sites as well as the Maecenas archive.