Roman plumbing in action at Bath, Somerset. This is the oldest geothermal spring overflow system in the country. It channels surplus thermal water from the Sacred Spring into the original Roman Great Drain, maintaining a controlled flow into the River Avon over 400 meters away. A successful application of gravity flow dynamics that highlights the advanced understanding of fluid mechanics by Roman engineers... and it's still in action today 😮 Discover Roman Bath on a private guided tour with #br