There are many names for places where people worship. A good many cultures hold their religious worship services in a temple. Others have synagogues and mosques. Christians have labeled their religious buildings as churches. Some are referred to as cathedrals. The sole difference between a church and a cathedral is actually administrative. A cathedral is where the bishop is housed. Bishops have the work of running all the churches in their area, called a diocese.
There are several Christian religions that use this form of administrative structure. Roman Catholic and Episcopal churches have both churches and cathedrals. Many other Christian sects have only churches. Their administrators are not called bishops, so they do not have cathedrals. No matter what their designation, all churches and cathedrals are considered houses of worship. If they are still operating, religious services are held on a regular basis. Many of the older churches have historical roots and can be toured.