Side effects associated with radiation therapy occur because the high doses of radiation used to destroy cancer cells can also damage healthy cells and tissues located near the treatment area. However, major improvements in radiation technology have made it more precise, leading to fewer side effects.
Here is a great documentary about Sutro Baths made by Juli Lopez, who was a student at the Academy of Art here in San Francisco. There is some great black and white footage from inside the baths! The Ruins Today... If you watched the documentary, you know that the tragedy of Sutro Baths is that it burned down in 1966. What wasn't mentioned in the video is that for several years before, the revenue it brought in wasn't enough to cover its operating and maintenance costs, and it had to close.
The Colosseum's partial destruction allows us to see into the bowels of the amphitheatre, in a way that no ancient could. But when the Colosseum opened in AD 80, Titus staged a sea-fight there (in about one metre of water), and recent research has shown convincingly that the amphitheatre had no basement at this time.