"I think this is the most beautiful train line I've ever been on." Those words genuinely escaped my mouth as my wife and I rattled through the Scottish Highlands, skirting the edges of glistening lochs, weaving between ancient mountains, and crossing hauntingly stark yet stunning moorland. "You've been on it before," she kindly reminded me. Thankfully, my tendency to experience something and then completely forget about it doesn't diminish its beauty one bit. The legendary West Highland Line