The Grabijolai Cognitive Trail is a "wild" hiking trail, which will lead you to the thickest oak in the entire Neris Regional Park - the old man Alkų oak from the ethnographic street village of Grabijolai. The entire trail, which is about 4 km long, is marked with directional arrows, but you will not find wooden stairs and gravel tracks. That is why we call it the "extreme, wild trail". The path will run through meadows, fields and former country roads, steep slopes and deep gullies. Therefore, it is necessary to wear comfortable, moisture-proof footwear with a non-slip sole, and to set out for a difficult, "wild" walk. The trail will take you to the Alkai Oak and take you back, so you will return almost on the same path you came from.