Rio Grande Gorge near Taos, NM just after sunset. The gorge is 1200 ft wide and 650 feet deep at this point. It's spanned by a bridge that has two observation decks on either side. The only thing that seperates you from it's yawning maw is a 4 foot metal railing. In fact, the locals will tell you that the bridge is haunted by the ghosts of those that have thrown themselves off of it, always trying to lure more people to test their wings!