Lakes are an attraction for life. In many places, they are the only ready source of fresh water suitable for drinking and bathing, and tend to attract both animal life and human settlements. Even in otherwise desolate or hostile regions, lakes offer a bastion of life unrivaled by anything else on Earth save perhaps rivers.
Lakes offer some distinct advantages for life, such as their size which can support significantly more aquatic life and larger surrounding areas, and their general lack of swift motion that can make rivers more treacherous.
Lakes are great for photographers, because they can offer a serene contrast to the surrounding environment, and the wide surface area of the water can create beautiful and refreshing reflections and scenes.