Start your day early, and head towards Serolsar Lake. The journey is going to be hectic, but the destination is worth it. The lake is surrounded by mesmerizing beauty, and the water is so serene that it will take away all your tiredness. You can also enjoy a picnic with your loved ones and relax in nature. Afterward, you can head back to Kullu and enjoy the local cuisine.
Visit the Great Himalayan National Park, which is home to various species of flora and fauna. The park has several trekking routes, and you can choose the one that suits you. If you're lucky, you may even spot some rare animals like snow leopard and Himalayan Brown Bear. In the evening, head back to Kullu and check out some of the local markets.
On your last day, visit Jalori Pass, which is a perfect destination for adventure seekers. You can enjoy trekking or hiking or even try some adventure sports like mountain biking and rappelling. The place is surrounded by lush green forests and majestic hills, and the views are breathtaking. In the evening, you can head back to Kullu and enjoy some local delicacies.
If you're interested in exploring more, you can also visit Tirthan Valley, which is known for its beautiful waterfall and trout fishing. You can also plan a day trip to Manali, which is one of the most famous tourist destinations in India. If you're looking for some relaxation, you can visit the hot springs in Manikaran.