Welwyn Roman Baths

Nine metres down, deep under the A1(M) in Hertfordshire, there's a secret bunker protecting the archaeological remains of Welwyn Roman Baths. The farmstead was discovered in the 1960s, just as the motorway was being constructed.

I found the location just as interesting as the site actually. A sign said that local archaeologists battled 'red tape and disinterest' to have a vault constructed and protect the site. I'm glad they did as it's totally unique.