Aerial circling shot of Tumulus of Koninksem on sunny day, Tongeren, Belgium

aerial roman circling tumulus koninksem sunny day tongeren belgium burial mound burial grave barrows kurgan small hill landscape outdoors outside nobody blue sky cloudless tree green greenery copy space scene scenario view ground ancient prehistoric archaeological archaeology touristic tourism belgian tourist destination travel trip location nature natural countryside galloroman scenery environment road 4k romeinse kassei