Near Tomaszow Mazowiecki about 3 km from the center is located Reserve Blue Springs. It is a water reservoir located in the forest, with a few islands overgrown alder wood. It was created as a result of flood karst. Of the slots on a limestone base beat colorful source. They have a unique blue-green color derived from the green mineral glauconite, which is located in the rock medium. Water beating sources has a constant temperature of 9.5 deg. C, even in winter. In water, there are many species of fish that can be seen in the clear water. Around the sources are walking paths, where you can admire not only water but also many species of birds living there.