Skyline feature is a term used to describe the prominent features of a city skyline. The two most common skyline features are spires and steeples. A SPIRE is a tall, slender tower that is usually part of a church or other religious building. A STEEPLE is a tall, pointed structure that is usually part of a church or other religious building. Both spires and steeples are often seen in city skylines and are iconic symbols of many cities.