Wikipedia and Bartholomew's Cobble's own website can give you a complete description of why it's called the Cobble, its history, landscape, geography, etc. For me, though, it's a place of wonder, a place to enjoy the treasure hunt for wildflowers from early spring's white and lavender Hepatica and skunk cabbage, on to blood root, wild columbine, trillium (white and red), and dozens of others too numerous to list here.
Its 329 acres and roughly 5 miles of well-marked trails take you up to high (1000' ) fields and meadows ablaze with summer wildflowers and spectacular views, down along the banks of the Housatonic River that weaves and snakes through the area, into mysterious hemlock woodlands, by caves, and along rock outcroppings on which grow probably more species of ferns and moss than you'll see anywhere else in one place.
The only caution I'd have is be sure to bring some industrial strength insect repellent (in summer) and charged camera batteries. Also, alas, NO DOGS are allowed in this delicately balanced ecosystem.
Take a picnic and your sense of wonder... and enjoy! It's truly a magical place!
To visit the Bartholomew's Cobble website and find out what activities are on offer, like canoe trips with an extremely knowledgeable ranger and guide, go to: