Angel Falls is a 90-foot waterfall on Mountain Brook in Township D – northwest of Houghton – in the White Mountains of Franklin County, Maine. The "remarkably scenic" Angel Falls is a set of plunging tiers totaling 90 feet in height, and with surrounding cliffs of 115 feet in height. Flowing out of a 25-foot-wide gap in the cliff, it is thought by many to …Angel Falls is a 90-foot waterfall on Mountain Brook in Township D – northwest of Houghton – in the White Mountains of Franklin County, Maine. The "remarkably scenic" Angel Falls is a set of plunging tiers totaling 90 feet in height, and with surrounding cliffs of 115 feet in height. Flowing out of a 25-foot-wide gap in the cliff, it is thought by many to be the tallest waterfall in Maine, tied for height with Moxie Falls, though this is not the case; as Katahdin Falls, also in Maine, is some 710 feet taller. Angel Falls is so named as, when the water flow is right, the falls appear as an angel.