Start your trip by visiting one of the most popular tourist spots in Bangalore, the Lalbagh Botanical Garden. This 240-acre garden has a variety of flora and fauna, including over 1,000 species of plants and a beautiful glasshouse. You can take a leisurely walk, enjoy the scenic beauty of this garden and learn about the different plant species it has to offer. Be sure to carry water and sunscreen on your visit.
Visit the Bangalore Palace, which is a must-see place due to its beautiful architecture and history. This palace was built by the Mysore Royal Family in 1887 and has a mix of Tudor and Scottish Gothic-style architecture. Inside the palace, there is a museum which showcases the royal life and possessions from the past and is open from 10:00 am to 5:30 pm.
On your last day of the trip, visit the famous Cubbon Park. It is a 300-acre park located in the heart of the city and has a large number of trees, fountains, and historical monuments. You can have a leisurely walk, play games or just relax in the park. After that, head to the Government Museums, which is one of the oldest museums in India with a display of a range of artifacts from ancient times. The museum is open from 10:00 am to 5:00 pm and is closed on Mondays.
If you have more time in Bangalore, you can visit other interesting places such as the Bangalore Fort, Nandi Hills, Tipu Sultan's Summer Palace, and more. If you have less time than 3 days, you can consider only visiting the first two places.