The Gateway of India is a historic monument in South Mumbai, built in 1924 to commemorate the visit of King George V and Queen Mary. It stands 26 meters tall, combining Hindu, Muslim, and Western architectural styles. The Gateway is significant in Indian history as the site where the last British troops left in 1948, marking India’s independence. It's a popular tourist spot offering views of the Arabian Sea and Elephanta Island, and is close to landmarks like the Taj Mahal Palace Hotel and Colaba Causeway.