Gileston Farm as Field
A woman walks in from the fields on an alien planet. Shortly thereafter the TARDIS lands in the same field and Bill & the Doctor walk towards the colony.
Source: The Doctor Who Locations Guide
“Smile” Filming Locations
The Doctor takes Bill to a human colony in the distant future where something horrible happened to the colonists when they didn't smile.
Doctor Who episode “Smile” was filmed in Newport in the United Kingdom and Valencia in Spain.
City of Arts and Sciences as Colony
Bill and the Doctor wander around a futuristic city populated only by robots and attempt to find out why everything is so empty.
Uskmouth Power Station as Ship
The Doctor and Bill find their way into the colonists' original ship and look for a way to destroy it and the surrounding city.
Source: The Doctor Who Locations Guide