The Gateway of India is an iconic monument, built during the British Raj in 1924. It's an excellent spot to start exploring Mumbai and has an adjacent boat dock, where you can take a ferry to Elephanta Caves.
The Chhatrapati Shivaji Terminus is a UNESCO World Heritage Site. Built-in 1887, it's one of the most iconic architectural landmarks in Mumbai. The station serves as a hub for both suburban and long-distance trains, showcasing the hustle and bustle of Mumbai in full swing.
Crawford Market is famous for its colorful architecture, and the fresh produce market is one of the oldest and busiest markets in Mumbai. This place is a haven for street food, where you can savor Chaats, Vada Pav, and other Mumbai delicacies.
The Haji Ali Dargah is one of the most famous shrines in Mumbai and a significant landmark of the city. It is a beautiful mosque built-in 1431, located off the coast of Worli. The mosque is teeming with people and provides a mesmerizing view of the Arabian Sea.
Marine Drive, also known as the Queen's Necklace, is a 4.3 km-long promenade along the Arabian Sea that offers a spectacular view of the city's skyline. This spot is serene and perfect to enjoy the sunset with a refreshing ice cream from one of the many ice cream vendors along the way.
One day can be a brief period for exploring Mumbai fully, but you can still cover many iconic places. If you have more time, visit Elephanta Caves or Chor Bazaar, a famous flea market. You can subtract Marine Drive for a shorter itinerary, or add the Bandra-Worli Sea Link for an extended trip.