Advertisement In 2016, President Obama established an offshore national monument (the Northeast Canyons and Seamounts Marine National Monument) on submerged lands and associated waters in the Exclusive Economic Zone (EEZ) of the United States, i.e., between 12 and 200 miles from the coastline. This preserve covers nearly 5,000 square miles, about 130 miles off Cape … Continue reading National Monuments, by Land and by Sea