The Amsterdam Canals are a network of waterways that form a significant part of the city’s landscape. Built in the 17th century during the Dutch Golden Age, these canals were designed for trade, defense, and drainage. The most famous canals include the Herengracht, Prinsengracht, and Keizersgracht, which are lined with historic buildings and houseboats. Today, the Amsterdam Canals are a UNESCO World Heritage site, attracting millions of visitors each year. They offer scenic views and are popular for boat tours, cycling, and walking. The canals also play a vital role in the city's ecology and urban planning.