Visit the Red Fort, Jama Masjid, Raj Ghat and India Gate. Take a rickshaw ride in Chandni Chowk and indulge in local delicacies. End the day with light and sound show at Red Fort.
Witness the beauty of Taj Mahal during the sunrise. After having breakfast, visit Agra Fort followed by Itimad-Ud-Daulah and Mehtab Bagh.
Start early and reach Manali, visit the Hidimba Temple, Jogini waterfall and stroll around the Manali Mall Road. On day 4, see the Solang valley and indulge in activities like paragliding and skiing.
If you have more time, you can add a visit to Fatehpur Sikri from Agra. Consider adding an extra day in Manali for more activities. If you have less time, you can skip Chandni Chowk and Mehtab Bagh.