While itself welcoming, the Tijiana treehouse also makes very real the physical separation between countries: you can see the US from here, but you can see the miles of wall, too. And, for the moment, you can also see a white cross planted on the American side. With the help of children, Chim↑Pom scaled the border wall to place the piece there as a symbolic grave to liberty — a gesture that also highlights how the wall is essentially a formality and a formal construction. “Libertad” is a tribute to all who lost their lives attempting to cross the border. A plastic circle lies at its base, representing a hole that metaphorically links it to another work, “The Ground.” A literal hole dug on the Mexican side, “The Grounds” extends beneath US soil but does not cut through all the way. It is another place of in-betweenness and of uncertainty; it reminds of the airports were immigrants returning to the US were recently trapped under Trump’s ban, a space of restricted access.