Sanatorio de Abona as Turmezistan
The Doctor and Bill are brought to a small village near where a strange pyramid appeared overnight and work with the United Nations and several military leaders in an attempt to determine its purpose.
“The Pyramid at the End of the World” Filming Locations
The Doctor is summoned by the United Nations to investigate a mysterious pyramid that appeared in a sensitive military area overnight.
Doctor Who episode “The Pyramid at the End of the World” was filmed in Tenerife in Spain and in the United Kingdom.
MOD St Athan as Airfield
Bill gets on a United Nations airplane.
Source: The Doctor Who Locations Guide
Energy Safety Research Institute (Sefydliad Ymchwil Diogelwch Ynni) (Swansea University) as Agrofuel Research Operations
Some scientists are working on a bacteria for plant growth when something goes horribly wrong.
Source: FPL Pasq — Twitter