As far as President Donald Trump has announced, there are no plans to make the southern border wall 700 feet tall or constructed out of ice. Even so, a wall spanning the 1,989 miles of the U.S.-Mexico border is a feat that could use the help of a little bit of magic.
To put it in some fantastical perspective:
"I will build a great wall," Trump promised during the 2016 campaign, "and nobody builds walls better than me, believe me." Tell that to the Night's Watch.