D6 Tynaarlo is the name given to a Neolithic passage grave located in the Netherlands. The site is one of the many well-preserved passage graves in the country. The megalithic structure sits in a small wooded area next to some modern houses. The mound that once buried the structure no longer exists, but the 3 capstones and multiple support stones still remain today and are clearly visible. The site is also visible from the nearby road.