The Izu 'Resort Dolphin' train

If you're traveling down the east coast of the Izu Peninsula, you might be lucky enough or sufficiently well-organized to catch a train with a view. Departing from Atami and making the trip all the way down to Shimoda, the 'Resort Dolphin' has bank seats on the ocean-facing side, so you can sit back with a snack or drink and watch the scenery roll past. You'll see panoramas across the ocean, the occasional steaming tower of a hot spring, and at one point the line runs directly alongside the shore to give you a close-up of the sea.