These days churches are incredibly varied in their design, their philosophies and doctrine, and even their interaction with and inclusion of their congregation.  Although the majority of churches that belong to the same Christian denomination (Protestant, Catholic, Orthodox, and so forth) will likely follow similar practices and architectural designs, if you venture into different denominational churches you may begin to notice quite significant differences. 

If you are thinking about beginning to attend church or have moved to a new area and are looking for a church to join, you will first have to determine which denomination you feel you belong to.  For some people this may be obvious - you may have been brought up or christened within a particular faith.  For others who may not have had the benefit of a christening or Christian upbringing, or who would like to change their denominational orientation, picking a new focus may be slightly trickier.  It is certainly advisable that you read as much about the background histories and modern beliefs of the denominations you are considering so that you can find one which most accurately fits with your own beliefs.