Main entrance to the baths.
This is all that remains of the Roman baths in Wroxter, England. At one time these ruins were the height of Roman engineering design with hot and cold pools, underfloor heating and flushing toilets. As befit a major city of the Empire, the baths were massive being able to serve up to 1000 people at a time.
After the fall of the Empire, the baths were abandoned as the barbaian conquerors had no need for such sophisticated social cleanliness. Over time the baths were demolished not by war, rather they were literally taken apart piece by piece to be used as construction material in near by villages and farms.