Roswell
Roswell was a small town in New Mexico, in the United States of America, which, much like London, became a hub of alien activity in the 20th century.
In 1947, a Nedenah flying saucer crashed near Roswell and was salvaged by the United States Army. (PDA: The Devil Goblins from Neptune) And around the same time a craft piloted by a Gray alien ambassador also landed in the vicinity. (DW: Dreamland).
The crash became a cause celebre for decades among UFO and conspiracy theorists, due to government attempts at covering up the incident after it had been reported in the press. (DW: Dreamland). A mileometer from one of the spacecraft later ended up in the collection of Henry van Statten. (DW: Dalek)
Androvax, an enemy of Sarah Jane Smith and the Judoon, stated that the ships that the Nanoforms where building for him was a recreation of the spacecraft that had crashed in Roswell. (SJA: Prisoner of the Judoon).
In 1970, the Waro attacked the Army base there. (PDA: The Devil Goblins from Neptune)