Teddington Lock is a lock on the River Thames in London, England. It is located near the town of Teddington and serves as the boundary between the tidal and non-tidal sections of the river. The lock was built in the 19th century and is an important point for navigation, allowing boats to pass through while managing water levels. The lock features a weir and a set of gates that control the flow of water. It is a popular spot for both locals and visitors, offering scenic views and opportunities for walking along the riverbank. Nearby, there are also facilities for boaters and recreational activities.