Must see the place...important and the great place for Bhuddist...must spend more time for visit and chanting/pray at Lumbini Park, Lord Buddha Birth Place.
Apart from Lumbini park, the area really don't offer a lot of excitement - it is a very very small country side city, with houses of mud and grasses.
.. So 2 nights should cover it for most peoples... But it is on the other hand a very quiet and tranquil place, and place of reflection maybe ? as such - stay untill Your soul is fully filled by the special atmosphere...
I went to Lumbini 20 years ago & was horrified at how trashed it looks now. Rubbish all around the walls of the religious site.
Horrendous poverty. The people look desperate. What was really upsetting was the terrible condition of the dogs..& how cruel the locals are to them. The dogs are starving so much so they have ricketts, mange so severe some have no hair. Broken bones from the increased traffic, mostly motorbikes & high performance vehicles tearing through agricultural villages. Too many hotel too close to the site. Horrible place now.
The obvious place to visit is where the Buddha was born, which is within walking distance of the hotel.
Take time to go into the temple nearby, which has a small gold mark inside identifying the exact place of his birth as Prince Siddartha over 2,500 years ago.