The cactus doesn't attract one bit of attention... until it blooms. Google "night blooming cereus," and you'll find a community of ardent admirers of the plant, some utterly magnificent photographs, and reams and reams of print.
We're fortunate to see them in the wild here in Tucson. This one bloomed along a riding trail in Catalina State Park, just north of Tucson, AZ, in the shadow of Pusch Ridge.
Photo copyright Mike in Tucson