The playground includes three three-metre rock walls for children to scale, a series of tree forts, slides, boulders, tree trunks and branches to clamber on, and there's a natural creek line nearby.

Portland Treehouse Company Can Create Your Perfect Sky Fort ... rock-climbing wall or bucket-and-pulley system. ... started Portland Treehouse Company in 2016 after a lifelong love of tree climbing.

The walls stand along the slope atop one of the mountains on the old Fort McClellan property. Beyond the trees is a view of farmlands and timber. Not far away are old fire trails today.

Before this year’s Rockefeller Center Christmas tree became the most famous greenery on the planet, it was Albert Asendorf’s fort. The Norway spruce in the front yard was already 20 feet tall ...