Ooty Lake is a man-made lake that offers boating and other water activities. It's surrounded by beautiful gardens and is a perfect spot for a group photo. Avoid visiting during weekends and holidays when it can get crowded.
Avalanche Lake is a serene and secluded lake that offers breathtaking views of the mountains and countryside. While you can't swim in the lake, you can go for a walk or trek around the area. It's recommended to bring snacks and drinks with you as there are no shops nearby.
Mudumalai National Park is a great place to experience nature up close. You can take a jeep safari and spot elephants, tigers, and other wildlife. The park also has beautiful waterfalls and trekking trails. Note that the park is closed on Tuesdays.
If you have more time, you can add a visit to the Doddabetta Peak or the Tea Factory and Museum. If you have less time, you can skip Avalanche Lake and spend more time exploring Ooty or Mudumalai National Park. Make sure to pack comfortable shoes, sunscreen, and insect repellent.