Boundless Adventures is opening in late Spring 2019! Boundless Adventures is the largest outdoor aerial adventure park in the Milwaukee-Chicago corridor. With 9 courses of 4 different difficulty levels, there is something for everyone ages 7-97. Each course offers the thrill of a zipline while you face a diverse array of bridges and ladders between the tree platforms. The courses are 10-40 feet from the ground, and depending on the difficulty level, will test your balance, strength, stamina and agility.