Water is unusual in that the solid form, ice, is less dense than the liquid form, which is why ice floats. Water has a high specific heat index. This means that water can absorb a lot of heat before it begins to get hot. This is why water is valuable to industries and in your car's radiator as a coolant. The high specific heat index of water also helps regulate the rate at which air changes temperature, which is why the temperature change between seasons is gradual rather than sudden, especially near the oceans.
Water has a very high surface tension.
In other words, water is sticky and elastic, and tends to clump together in drops rather than spread out in a thin film.