Angkor Wat is the world's largest religious structure, covering some 400 acres (160 hectares), and marks the high point of Khmer architecture. Aerial overview of the main Angkor Wat complex, Angkor, Cambodia.
I would say these would be transform boundaries where the tectonic energy appears to be transformed from one plate to another such as off the coast of Guatemala so it is not a simple process of subduction,.
As with the rising of the sea levels, the coastal lands have become vulnerable to the impacts of the high waves and their chances of flooding and drowning are common and thus these areas are eroded by the activity of the ocean and the seas. Due to the impacts of the climate changes taking place the low lands and the coastal lines are vulnerable to the sea-level rise.
