Antiquities Act

Troy Smith / Flickr Creative Commons

President Donald Trump signed an executive order that questions the validity of some national monuments in the West.  The order applies to any national monument created after 1995 that totals at least 100,000 acres.

Friday, the Interior Department released the list of monuments up for review and announced the first-ever public comment period on the topic. In a new twist, Idaho's Craters of the Moon National Monument made the list.

Andrew Selsky / AP Images

Earlier this week, President Obama created two national monuments. The newly preserved land is in Utah and Nevada. But before the transfer of power to President-elect Trump January 20, Obama could also designate 2.5 million acres of land near the Idaho border.