A walk along the well-equipped Žiegždriai Geological Trail, which in places hangs on the slope above the Kaunas Reservoir, will not only burn 120 kilocalories but also teach you, for life, the difference between stalactites and stalagmites. Yes, this is the only place in Lithuania where you can find rock icicles formed by dripping water and finger-thick stalactites. The 1.6 km wooden trail winds, climbs and descends by stairs, opening up a panorama of the Kaunas Reservoir – stop at the rest areas and you can see the Vieškūnai hillfort, Palemonas and the towers of Pažaislis Monastery. But the most impressive view awaits at the end of the trail: the Kalniškiai conglomerate outcrop. Conglomerate is a natural cement of lime, clay, gravel and shingle formed since the Ice Age. The outcrop is as much as 400 m long and 22 m high. The rock is full of gaping holes, and sizeable blocks keep breaking off the cliff and falling into the reservoir or rolling down to the shore, so nature is still shaping the shoreline. As you walk you will also notice the thickest century-old linden tree around the Kaunas Reservoir. Try hugging it – its girth is “only” 4.3 m. Travellers who come here are surprised to discover not only natural beauty unusual for the Lithuanian landscape but also fun information boards with puzzles. So if you want to get your children interested in science, bring them along and wait patiently while they piece together the puzzles along the way about local plants, birds and other natural treasures. Wash your hands in spring water and, as one of the boards aptly puts it, “There's no Wi-Fi here – find a connection with nature”. Wear comfortable shoes and remember that, because of the stairs, the trail is not suitable for bicycles or pushchairs. It is also not a loop, so save some energy for the way back.