On my tour of the south of Nepal, I travelled from Chitwan (Sauraha) to Lumbini by public buses. A Japanese guy and I were dumped at the roadside, amidst flat agricultural lands and some forest. 'This is Lumbini', they told us. It's a quiet area, natural in outlook, and with its temples hidden from first sight.
The actual site is quite small: a few excavations and a large tree, that is all to see. Still, it is a very serene place. For a few years several Buddhist Asian countries are building their own temples and monasteries around the original site (according to the "Lumbini Masterplan" by a Japanese architect). They try to surpass each other in beauty. The very different building styles make for an eclectic view.