It is below Middle Hill[1] on the Upper Rock, at the site of an Isolation Hospital by Governor's Lookout.

The Poca Roca Cave fissure runs through the Rock of Gibraltar in a general west–east direction from Bell Lane in the old town area to Catalan Bay on the coast.

[3] During the three-and-a-half-year-long Great Siege of Gibraltar the population of the Rock made use of the caves to shelter from the bombardment.

Beefsteak Cave was used by Gibraltarians whilst Poca Roca cave was prepared in August 1779 for use as apartments by General George Augustus Elliot (afterwards Lord Heathfield of Gibraltar[2] the Governor of Gibraltar.

[1] This cave was later used as a storage area for gunpowder (to serve the artillery batteries on the heights[2]) after the siege had been abandoned in 1783.