Though plans for a border wall – a literal barricade dividing the U.S. and Mexico – are moving forward, the vision for a property just south of the existing border fence strives to connect Tijuana and San Diego more than ever by becoming a hub for where people from both sides of the border can live and work.

There’s been an uptick in art projects happening at the border now that President Donald Trump is in office. With so much attention on the border, it’s worth taking a quick look at some of the art that’s attempted to tackle the prickly issues surrounding it. Here are 20 instances of gutsy, controversial art that has explored the border.

When First Lady Pat Nixon inaugurated Friendship Park in 1971, she said, “I hope there won’t be a fence here too long.” Instead, the fencing and wire has gotten more intense. But it hasn’t stopped a steady stream of cross-border gardening ventures, yoga classes, prayer services and fleeting pinky touches.

In this week’s San Diego Explained, Ari Bloomekatz and NBC 7’s Catherine Garcia explore the troubled past of the defunct Desert Line, highlighting where the project to rebuild the track is headed.