Akshardham Temple
Akshardham temple is a one stop point of Indian culture, spiritual environment and an ancient architecture. According to Wikipedia, over 70% of tourist visit Akshardham when they come for tourism in Delhi. The most popular attractions of Akshardham temples are-
Musical garden
Large landscape garden
Cultural exhibition shows
Cultural Boat Ride etc..
The popularity of this temple is evident in the fact that 7 out of 10 people who visit Delhi pay their visit to Swaminarayan Akshardham Temple