Hardknott Roman Fort - Credit: Wikimedia Commons
Hardknott Roman Fort is an archeological site, the remains of the Roman fort Mediobogdum, located on the western side of the Hardknott Pass in the English county of Cumbria. The fort was built between 120 and 138 on a rocky spur, and was initially garrisoned by a detachment of the Cohors IV Delmatarum from the Dalmatian coast (in modern Croatia). It was abandoned around a decade later, then reoccupied circa 200 and remained in use for much of the next two centuries. Read more on Wikipedia
Source: en.wikipedia.org