101 Lower Thames St, Billingsgate, London EC3R 6DL, UK
Beneath the pathways of the Square Mile lies a rich Roman history surviving 2,000 years of building, fires and bombings. The remains of the Roman villa, complete with heating and baths, lies underground here. Accessible by booking only.
Read more:
https://www.cityoflondon.gov.uk/things-to-do/visit-the-city/attractions/Pages/Roman-Bathhouse.aspx
90 Gracechurch St, Langbourn, London EC3V 0DN, UK