Subsidence to sinkholes and rockfalls to avalanches. Each geographic area has its own combination of hazards. Looking at Boston, can you find structures that we engineered to prevent mass movements? Are there areas that are unprotected but which you think may be vulnerable? Solution In boston there are high chances of rockfalls and avalanches.Yes there are many unprotected areas like the houses that are built at the foot of the hills which are highly vulnerable to the natural disasters.These are to be protected by shifting to safer areas.Now due to development in technology the building that are constructed are resistable to natural calamities like earthquake by providing damping systems..