Explanation:

- The Elephant Festival is a colorful and lively event celebrated every year in the district of Jaipur, Rajasthan.

- It marks the occasion where elephants are adorned with paint, jewelry, and clothes, participating in various events.

- The festival is a significant attraction for tourists, showcasing cultural vibrancy and the importance of elephants in Indian tradition.

- Jaipur is known for its rich cultural heritage and hosts several other festivals throughout the year.

- Alwar, Kota, and Ajmer, although significant cities in Rajasthan, are not known for hosting the Elephant Festival.

Answer: Jaipur