“Cold Blood” Filming Locations
Doctor Who episode “Cold Blood” was filmed in Cardiff & Newport in the United Kingdom.
Plantasia Botanic Gardens as Silurian City
The Doctor and Nasreen Chaudhry are escorted through the city to the senate chamber.
Source: The Doctor Who Locations Guide
Bute Park as Park in Flashback
Amy remembers kissing Rory on a park bench while trying not to forget him.
Source: The Doctor Who Locations Guide
Temple Of Peace as Silurian Senate Chamber
Amy, Nasreen Chaudhry, Mo, and the Doctor are taken to be executed in this chamber. Later the chamber is used for the human/silurian negotiations.
Source: The Doctor Who Locations Guide