bridge in purgatory chasm state reservation on trail berkshires, massachusetts usa autumn

tree leaf nature yellow green plant trunk branch autumn forest wood woodland sunlight heart painted carved trail berkshires massachusetts usa hiking natural travel outdoors outdoorsy outside enviornment fall woods woodsy bright pergatory purgatory chasm state reservation loop charley charleys hike danger dangerous rock formations slippery formation stretches quarter-mile believed formed sudden release dammed-up glacial meltwater last ice age approximately 000 years department conservation recreation declared 1919 bridge usa recreation 1919 metal