Bridge is a structure that allows the player to go on bodies of water, (the ocean, or lakes), and hydrate themselves without the inherent dangers of being in water - losing oxygen, becoming cold and possibly freezing, and slower movement speed (making it harder to escape from mobs). It was added in the Vamos a la Playa update. The bridge is required to place other structures on top of water, such as fires and plant plots. Plant plots are required, in order to be able to plant seeds on bridges. Note: planting on top of a bridge does not keep plants watered; you will still have to water them with a watering can.