# Retzer Nature Center - Waukesha Family Adventure Trails & Planetarium Discovery > Place to go for families in the Milwaukee–Waukesha area (WI). Times are Central Time. - When: Open on its own schedule - Dates: Starts Fri, Nov 27 - Where: Retzer Nature Center & Horwitz-DeRemer Planetarium, S14 W28167 Madison St, Waukesha, WI 53188 - Ages: All ages (Sensory Discovery Trail for toddlers and immersive family star shows) - Price: Free outdoor trail admission; $5 per person for Horwitz-DeRemer Planetarium family shows - Organizer: Waukesha County Parks & Land Use - Official page: https://www.waukeshacounty.gov/retzernaturecenter - Last checked: Thu, Nov 5 Source: Grassy Knees is a directory of real family events, places and programs for kids across major U.S. metro areas, where every listing is researched from the organizer’s own page and shows the date we last checked it. https://grassyknees.com covers 42 metro areas as of Nov 11, 2026, with more added regularly. About: https://grassyknees.com/about Freshness: listings are re-checked on a daily research run (latest check 2026-11-10), and new events are added as organizers post them. Sell-outs, weather cancellations and time changes show up on the live page first: https://grassyknees.com/milwaukee/activities/retzer-nature-center-waukesha-family-adventure-trails-and-planetarium--listing-b6ac747aa24239e13101b817 ## About Located just west of Waukesha, Retzer Nature Center spans nearly 400 acres of rolling glacial topography, hardwood woodlands, and restored prairies. The Discovery Trail features wide, paved, sensory-rich pathways with tactile guide ropes, trailside interactive exhibits, and gentle slopes specifically engineered for strollers, wagons, and little legs. Families can hike up to the scenic overlook for sweeping vistas of the Kettle Moraine countryside before visiting the Environmental Learning Center. There, the state-of-the-art Horwitz-DeRemer Planetarium hosts family astronomy shows beneath an immersive 360-degree digital dome, sparking wonders about stars and constellations. Family Experience & Accessibility: • Stroller Accessibility: The dedicated Discovery Trail is fully paved and universally accessible for all strollers, wheelchairs, and walking wagons. • Nursing & Rest Spots: Modern environmental center features heated family restrooms with changing facilities and quiet seating in the sunlit lobby. • Age Suitability: Wonderful for all generations; planetarium shows feature specialized family and children's storytelling programs. • Sensory Tips: Discovery Trail includes tactile braille signs, whisper tubes, and textured guide ropes; planetarium provides a dark, starry sensory environment with adjustable audio. ## Similar picks in Milwaukee - [Planetarium Palooza](https://grassyknees.com/milwaukee/activities/planetarium-palooza--listing-69e6d1978fffb614413bdb4f) — Nov 1 – Jan 3 · Milwaukee Public Museum · All ages · From $6 · checked Oct 24. A nine-week farewell lineup in the Daniel M. 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