Some more pictures that can be used as adventure settings. These were taken at Lost River Gorge & Boulder Caves in North Woodstock, New Hampshire. It is a 3/4 mile hike down and then up a gorge. Along the way up are various side caves you can enter. You should be able to click on the pictures for a larger view.
These are some of the interior shots along with some of the exits up and out of the caves, alot of the proverbial light at the end of the tunnel scenes.