Explanation: Keoladeo National Park, formerly known as Bharatpur Bird Sanctuary, is a renowned natural heritage site located in the Bharatpur district of Rajasthan. It is a significant wetland habitat that attracts a large number of migratory birds, making it a crucial site for birdwatching and wildlife conservation. The park was declared a national park in 1982 and was designated as a UNESCO World Heritage Site in 1985 due to its ecological importance.
The park covers an area of about 29 square kilometers and is a man-made wetland that was originally created as a hunting ground for the Maharajas of Bharatpur. Over the years, it has evolved into a rich ecosystem that supports a wide variety of flora and fauna. The park is particularly famous for its birdlife, with over 360 species of birds recorded, including migratory birds that travel from as far as Siberia and Central Asia.
Keoladeo National Park is not only a natural heritage site but also a significant tourist attraction in Rajasthan. It plays a vital role in promoting wildlife conservation and environmental education. The park's management focuses on maintaining the ecological balance and ensuring the preservation of its biodiversity.
In contrast, the Taj Mahal and Hawa Mahal, while significant historical monuments in India, are not natural heritage sites. The Taj Mahal, located in Agra, Uttar Pradesh, is a UNESCO World Heritage Site known for its architectural beauty and historical significance. Hawa Mahal, located in Jaipur, is a famous palace known for its intricate architecture and historical importance. Both are important cultural landmarks but do not fit the criteria of being natural heritage sites.
Therefore, Keoladeo National Park is the correct answer as it is a natural heritage site in Rajasthan that is recognized for its ecological and conservation value. Understanding the distinction between natural heritage sites and historical monuments is crucial for comprehending the unique significance of Keoladeo National Park within the context of Rajasthan's natural and cultural heritage.