Explore amphibian life cycles and also see aquatic invertebrates up close in a hike below High Bridge to visit abundant vernal pools April 7 from 9 to 11:30 a.m. The land below High Bridge has an abundance of these pools because of borrow pits and clay mining from brick production in the 1800s. Visitors will need to be prepared for cold, damp conditions, and a round trip hike of about a mile. Children are allowed.