Clifton Cathedral is one of Bristol's boldest modern churches, completed in 1973 with a sharp, concrete-and-granite design that looks nothing like the city's older religious buildings. The interior is equally modern, shaped around light, geometry, and a central worship space.
It is worth a look if you are already exploring Clifton or if postwar architecture interests you. The building is still a working Roman Catholic cathedral, so check service times before wandering in.