Caldes de Montbui is a town located in Spain.
Phil Coulson and Alphonso Mackenzie tracked down a woman named Agnes Kitsworth in an attempt to use her to arrest Holden Radcliffe. After Kitsworth agreed to help the S.H.I.E.L.D. agents, Radcliffe called her, but he convinced her to follow him instead, which led to a gunfight erupting in the city between the S.H.I.E.L.D. agents and the Watchdogs accompanying Radcliffe.