Image from the National Geophysical Data Center
Image from the USGS
Western South America is a classic ocean-continent convergent boundary. High volcanic mountains (the Andes) and a deep trench offshore (the Peru-Chile Trench) and the clear topographic signs of this type of boundary.
The following images show topography and its relation to this convergent plate tectonic boundary.
Image from the National Geophysical Data Center
Image from the USGS