Deadly Nightshade

While not on the Antiquities wall proper it's the closest wall. This route can be accessed year round (even when the water level is up) because it sits on a legde up off the river. When the river is down it is easiest to walk down the riverbed to access this boulder but you can walk to it from Isla de Los Locos. Most people stick clip the first and 2nd bolts. Starting with your left hand in the crack/OW face climb left to slopers and then up through a good slot, clip the last bolt from here to protect against groundfall potential while going for the lip. This line is waiting for someone bold enough to boulder it, the topout is easy once the lip is gained but a fall from the lip could land you in the river(bed)!

With your back to Isla de Los Locos walk perpendicular from the wall to the river(bed). On the bank of the river is a boulder this route faces the river(bed) and away from Isla.

Three bolts.