No, not all churches have a bell tower. Bell Towers (and the use of large bells) were used since ages past to call the faithful to gather at church for worship services / masses. Hence, most ancient / old church buildings (like cathedrals) do feature bell towers. However, most modern church buildings (especially those of the Protestant churches) don't have bell towers. Anyone is free to come in these churches and observe the worship services taking place (typically during Sunday).
Most (nearly all) churches in Suffolk, UK have towers.
Bell tower.
A bell tower is a tower in which a bell or set of bells is hung - especially a belfry.
The Bell Tower was created in 1957.
Bell Tower a.k.a. tin tower,also means if you know how to get to tin tower you can get to bell tower
The names at the base of the Swan Bell Tower are names of school children from all around the Perth metropolitan area.
Like all bell towers, it used to ring the bells for the church.
Bell tower is in Ecruteak City.
Bell Tower Building was created in 1887.
Bell Atlantic Tower was created in 1991.
Purdue Bell Tower was created in 1995.
The main structure is a bell tower. Where the bells are housed at the very top of the bell tower is known as the belfry.