Wissahickon Environmental Center- Tree House

Wissahickon Environmental Center- Tree House The Wissahickon Environmental Center is part of Philadelphia Parks and Recreation. It is located at the northern end of the Wissahickon Valley Park.

We provide a range of programming for school groups and the public.
The Wissahickon Environmental Center provides environmental education to families throughout Philadelphia, offering public and school programming. As park of Philadelphia Parks and Recreation, we also "advance the prosperity of our city and the progress of her people through intentional and sustained stewardship of publ

ic land and waterways as well as through safe, stimulating recreation, environmental and cultural centers. We help Philadelphia and its citizens grow by connecting people to the natural world, to each other, and to fun, physical and social opportunities." Any use of any part of the Tree House, Andorra Natural Area, Wissahickon, or the Fairmount Park System requires a permit. [email protected] for details.

06/11/2026
We hope you can JOIN US for a fun summer program at the Tree House! All programs are FREE. Please register on Eventbrite...
06/05/2026

We hope you can JOIN US for a fun summer program at the Tree House! All programs are FREE. Please register on Eventbrite.

Our Carolina Wren's returned to their nest this year! There are four eggs in this nest, and the parents lined it with so...
06/04/2026

Our Carolina Wren's returned to their nest this year! There are four eggs in this nest, and the parents lined it with some snake shed. Take a peek next time you're at the Tree House.

Here are a few photos from our geology walk today. We visited "Sarah's Rock" a formation named after Sarah West who doc...
06/02/2026

Here are a few photos from our geology walk today. We visited "Sarah's Rock" a formation named after Sarah West who documented and taught about the geology of the Wissahickon to the public for many years. Note the incredible twists within this formation caused by heat and pressure when this rock was buried far below the surface about 400 million years ago. This is metamorphic rock and the layers you see are schist and pegmatite (the white stone). Pegmatite is an igneous rock that intruded into the metamorphic rock. It has very large crystals formed by the slow cooling of magma underground.
Within the metamorphic rock of the Wissahickon, you find various interesting minerals, including garnets, tourmaline, and staurolite.

Recent scenes by the Creek. Ducklings, goslings, toad tadpoles, fish, and a water snake!
06/02/2026

Recent scenes by the Creek. Ducklings, goslings, toad tadpoles, fish, and a water snake!

Luna moth on the Tree House composting toilet building!
05/19/2026

Luna moth on the Tree House composting toilet building!

Look for the beautiful flowers of the Tulip Poplar tree for the next few weeks! The tree is tall, but the flowers fall ...
05/14/2026

Look for the beautiful flowers of the Tulip Poplar tree for the next few weeks! The tree is tall, but the flowers fall to the ground on a windy day.

Address

300 W Northwestern Avenue
Philadelphia, PA
19118

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm

Telephone

+12156859285

Website

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