A 100' aerial view of the Ravenglass Roman Bath House in Ravenglass, England.  The ruins are part of a 2nd-century Roman fort and naval base known as Itunocelum.  The still standing walls are 13 ft high, there are patches of the internal rendering, in dull red and white cement, and traces of the splayed window openings remain.

The remaining fragment appears to be the west end of a building which was about 40' wide and about 90' long.  The entrance and changing area (apodyterium) contains niches, perhaps originally for statues. The use of the other rooms is not known, but there would have been a range of warm rooms, a hot bath and a cold plunge. The north and south walls have external buttresses which were probably intended to take the weight of a vaulted roof.  Excavations were carried out at the bath house in 1881. Remains of the hypocaust heating system were uncovered, but they have since been reburied.

From: https://en.wikipedia.org/wiki/Ravenglass_Roman_Bath_House