Walking these trails, you’ll learn about the land and waterways that have brought people here for millennia.

Nearby excavations reveal cooking hearths, tools, seeds and remains of food that date back to the last glacier — more than 12,000 years ago.

475 million years ago, a colossal collision created the Appalachian Mountains

Rivers are among the oldest landscape features in the world.

Ecosystems — as small as a puddle, as big as a planet

Trees: Our best way to keep water clean — and Earth safe for humans

Invasive plants, insects, fungi and animals alter millions of years of natural balance.

The floodplain, where water comes and goes

Rising in a rocky, moss-covered spring, Cherry Creek meanders 13 miles through Cherry Valley to join the Delaware.