Temple Of Peace as New New York Senate
The Face of Boe and Novice Hame work to rescue the Doctor from the chamber filled with dead senators.
Source: The Doctor Who Locations Guide
“Gridlock” Filming Locations
Doctor Who episode “Gridlock” was filmed in Cardiff in the United Kingdom.
Former Ely Paper Mill as Expressway Entrance
Martha is kidnapped by the two drivers and taken to the expressway.
Source: The Doctor Who Locations Guide
The Maltings as Pharmacy Alley
Martha and the Doctor are exploring when a bunch of folks try and sell them drugs.
Source: The Doctor Who Locations Guide