One of Door County’s newest adventures includes speeding along zip lines near the tip of the peninsula. The activity begins with a short bike ride to a beginner climbing wall, which ascends to a 20-foot platform. Zip lines whir past ponds, sand dunes and the woods not far from Rowley Bay. Closed toe shoes are required, and kids must be 5 years olds and at least 50 pounds. Package deals with kayaking also are offered.