For this brief phase in international relations, then, the U.S./Mexico border formally included a strange, pop-up entry/exit point. A kind of embassy of the porous. Passport stamps from the experience must surely stand as some of the most unique in the world, like some variation on philatelic collecting. — bldgblog.blogspot.com
"Architect and designer Quilian Riano was on hand for the crossing, and these are his photographs reproduced here. By way of email, Riano described the physical terrain where they crossed beneath and through the border, remarking that the hydrological status of the land there 'really makes you think about how arbitrary borders are.'"