Above the main floor space of Westminster Abbey is a newly revamped attic, which had been used as storage room for centuries. The attic space, renamed the Queen's Diamond Jubilee Galleries, was once described by poet John Betjeman as having "the best view in Europe."

Westminster Abbey contains several "secret" or restricted areas that are rarely seen by the general public. One of the most fascinating is the Queen's Diamond Jubilee Galleries, located 16 meters above the Abbey floor in the 13th-century triforium; while now a museum, it was a "hidden" storage space for centuries. There is also the Pyx Chamber, one of the oldest parts of the Abbey with a massive double-locked door that once held the crown jewels and the "Pyx" (the chest containing trial plates for coinage). Perhaps the most exclusive "secret" is the Lost Chapel of St. Edward, or the small, hidden stone chambers within the thick medieval walls used by monks for prayer or storage. In 2026, the Abbey occasionally opens the Jerusalem Chamber for private events, a highly ornate room where King Henry IV died in 1413. These hidden nooks provide a physical timeline of British history, from the Norman era to the modern royal coronations.