The Museum of Nature is 0.9 mi (1.5 km) from central Lidzbark Welski, why not stop by during your stay. If you want to experience more of the culture Lidzbark Welski has to offer, head to Lidzbark Lake and Lidzbark Church.
If you're planning a bit of sightseeing during your trip, head to Ciechanow Castle (Zamek w Ciechanowie)— just one of the monuments in central Ciechanów.