If you are flying directly to Bhutan - Paro, then 3nights you cant see much. But
1. Thimphu and Paro Sightseeing - National Museum ,Rinpung Dzong , Visit Simply Bhutan to understand there culture, Zoo 2. Punakha & Wangdue - Punakha Dzong , Dochu La pass , Punakha suspension bridge ,Temple of Fertility 3. Take a Hike to Tiger Nest- Paro street walk
I have many Bhutan packages. If u are interested you can message me. Bhutan is very less crowded place. You can enjoy local culture, birding, trekking, cycling also many adventures and lots of fun.
For a 4-day trip to Bhutan, consider visiting Paro, Thimphu, and Punakha. Start with exploring Paro's iconic Tiger's Nest Monastery and the National Museum. In Thimphu, visit the Memorial Chorten, Tashichho Dzong, and the Giant Buddha Statue. Then, head to Punakha to see the majestic Punakha Dzong and hike to the Chimi Lhakhang temple. Along the way, immerse yourself in Bhutanese culture, try local cuisine, and interact with friendly locals. Remember to take in the stunning natural scenery and enjoy the serene ambiance of this Himalayan kingdom. If you want to travel to Bhutan visit https://wanderon.in/blogs/things-to-do-in-bhutan