Where are Kings and Queens of great Britain coronated?

Queen Victoria was crowned at Westminster Abbey in London on 28th June 1838.

Westminster Abbey, the Royal Church, so to speak. By the way Five Sovereign Queens lie buried in this church- Victoria is not one of them, She is interred at the Frogmore Mausoleum, in the Windsor Castle complex- the so-called Home Park, it is a memorial park, not a public pleasure garden.