The landscape of the Park is closely linked with the movements of a glacier, especially from the period 70 thousand to 10 thousand years ago (the so-called Baltic Glaciation). It is then, when, as a result of numerous geomorphologic processes, the present form of landscape was shaped. The largest area is covered by the moraine highland formed of glacial till, sands and glacial gravel, and its highest hill - Osowa Góra - is 132 m above sea level. The area of glacial high ground is cut by furrows made by the glacier, the so-called trough valleys. Numerous lakes are located in those troughs: Lake Łódź-Dymaczewo, Lake Witobel, Lake Góreckie, Lake Rosnowo, Lake Chomęcin, Lake Budzyń, Lake Jarosław, Lake Kociołek, Lake Skrzynka, Lake Lipno, Lake Wielka Wieś, and, last but not least, Lake Trzcielin. The one, which is considered to be the most beautiful of these, is Lake Góreckie. In the southern part of the Park the high ground area borders with the prehistoric Warsaw-Berlin Valley, carved in the ancient times by the water from the melting glacier (the Mosina canal runs in this direction). In the eastern part of the high ground there is the Valley of River Warta.
Other interesting landscape formations are hillocks of an oval shape - kames and forms that look like railway embankments - back furrows. The area of the Park includes a part of the longest back furrow in Poland - the Bukowo -Mosina furrow (37 km long). Erratic boulders are another element reminiscent of the region's past. The largest of them, the so-called Foresters' Boulder, has been under protection as a monument of nature.