A second year at school begins with warnings not to return and continues with attacks on students. The film is the darkest of the early entries, built around a hidden chamber and a diary that writes back.
A working castle in Northumberland, lived in by the same family since the fourteenth century. Its outer bailey stood in for the school grounds in the first two films.
Clementp.fr / CC BY-SA 4.0 (Wikimedia Commons)
England
Durham Cathedral
Interpreta: Cloisters and corridors
A Norman cathedral and UNESCO site whose cloister walks appear as school corridors. It is an active place of worship, open to visitors most days.
mattbuck (category) / CC BY-SA 4.0 (Wikimedia Commons)
England
Gloucester Cathedral
Interpreta: Corridors and the hospital wing
Its fan-vaulted cloister is among the finest in England and one of the most recognisable interiors in the early films.
Geni / CC BY-SA 4.0 (Wikimedia Commons)
Scotland
Glenfinnan Viaduct
Interpreta: The railway crossing
A curved concrete viaduct of twenty-one arches, built in 1901, carrying a line that still runs heritage steam services in summer.
Matthieu Riegler / CC BY 3.0 (Wikimedia Commons)
England
King's Cross railway station
Interpreta: The departure platform
A working London terminus. The platform scenes were shot here, though the arched brick backdrop most people picture is from the neighbouring station.
The wub / CC BY-SA 4.0 (Wikimedia Commons)
England
Lacock Abbey
Interpreta: Classrooms and corridors
A medieval abbey turned country house in Wiltshire; its chapter house and cloisters served as classrooms in the first two films.
Diliff / CC BY-SA 3.0 (Wikimedia Commons)
England
Christ Church, Oxford
Interpreta: The staircase and hall
An Oxford college whose fan-vaulted staircase and dining hall inspired and partly provided the school's great hall.
Dmitry Djouce / CC BY 2.0 (Wikimedia Commons)
England
Bodleian Library
Interpreta: The library and infirmary
Oxford's main research library, in use since the seventeenth century. Its Duke Humfrey's reading room appears as the school library.