Home to pretty treasures, Koilwar is India's best kept secret. The nearest major city to Koilwar is Bodhgaya. Attractions in Bodhgaya include Great Buddha Statue, Thai Monastery, Bodhgaya Multimedia Museum. Also, to reach Koilwar, you'll have to take a flight to Bodhgaya; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. Get in the character of the city, this city requires at least of 1 to 2 number of days of exploration.
Koilwar is an affair to remember, follow this apt itinerary of the place and return home with a bunch of memories.