Normally, training takes place in hotel conference rooms or boardrooms arranged as classrooms. Me... follow convention... not my style!
One of the largest groups I ever trained was in South Africa ~ a group of ninety people.
I took all ninety people two hundred miles from their base, into the middle of a Lion Reserve. When I say the middle, I mean a large clearing with locally styled buildings, swimming pools, restaurants and conference rooms, surrounded by trees and bush teeming with wildlife.
For five days, they trained during the daytime and experienced life on a lion reserve ~ campfires, outdoor barbecues and wildlife all around them, complete with spitting cobras!