The correct answer is Patan.
Patan is a city in Gujarat, India. It is the former capital of the Gujarat Sultanate and is known for its well-preserved medieval architecture. The city is home to a number of UNESCO World Heritage Sites, including the Rani ki Vav stepwell, the Jama Masjid mosque, and the Patan City Palace.
Ahmedabad is the largest city in Gujarat and is known for its textile industry. The city is home to a number of historical monuments, including the Sabarmati Ashram, the Jama Masjid mosque, and the Bhadra Fort.
Vadodara is the third largest city in Gujarat and is known for its palaces and gardens. The city is home to the Lakshmi Vilas Palace, the Sayaji Baug Palace, and the Vadodara Zoo.
Surat is the fourth largest city in Gujarat and is known for its diamond industry. The city is home to a number of historical monuments, including the Surat Castle, the Jama Masjid mosque, and the Dutch Garden.
Patan is the only city in Gujarat that is a UNESCO World Heritage Site known for its stepwells. Stepwells are ancient water harvesting structures that are found in many parts of India. They are typically built in a series of steps that lead down to a deep well. Stepwells were used for both drinking water and bathing. They are also important archaeological sites, as they often contain inscriptions and sculptures that provide insights into the history and culture of the region.