Philosopher of the Pool, Franconia Notch - New Hampshire’s Franconia Notch has an abundance of interesting attractions. Located along the Pemigewasset River just below the Sentinel Pine Covered Bridge is a natural basin known as the Pool. Created by glaciers at the end of the last ice age, this basin is 40 feet deep and 150 feet wide; the cliff walls are 130 feet high. Dating back to the 1800s, this basin has been a tourist attraction. Guests of the ...