i would shy away from the term radical ,but i'm kind of partial to the idea of creating hardscape elements i.e. walls ,roads , buildings ,ruins ,forts that don't necessarily relate to the golf game as bulkheads and rr ties might , but are integral to the strategy of the hole......functioning but not necessarily decorative is the litmus test.
many courses have incorporated these pre-existing features as they were found [TOC #17 ,north berwick ,dunbar etc.] , but i feel designing them from nothing to create strategic fabric and provide interest has merit.........but i'm sure this is hardly new , just new to me...