Central and South America are too large and too varied for any generalization to be valid - but prospective buyers of vacation property should bear the following in mind:
The art of garden design was one of the arts taken to South America by the European colonists and the early gardens were strongly influenced by Spanish and Portuguese precendents. In Brazil, Burle Marx led the way in using native plants and it is now recognized that South America has a fantastic pallete of plant material for use in garden design.
Peru
Machu Picchu
Copacabana, Brazil