Historic canals are man-made waterways designed for navigation, irrigation, or drainage. They played a crucial role in trade and transportation, connecting cities and regions. Notable examples include the Erie Canal in the United States and the Canal du Midi in France, both of which facilitated economic growth and development. These canals often feature locks, which allow boats to navigate changes in elevation. Many historic canals have been preserved or restored, serving as popular recreational areas for boating, walking, and cycling. They also provide insights into engineering techniques and the history of transportation in various cultures.