Ecomare

Rensumaborg is one of the less known Groninger borgs and not even that far from the much better known Menkemaborg. Here too is a lovely grove with a floor of the famous börgbloumkes. The majority of the trees in the groves are old truncated ash and maples, which have grown into fully fledged trees in the meantime. When the pilewort flowers massively in the spring, the bunches of leaves from the star-of-Bethlehem are also very evident everywhere. This plant only blossoms later on, in May, when its leaves have more or less disappeared. Trees and ponds have been placed on the west side of the borg and is a fine area for walking and bicycling.

The fantastic old weathered pollard willows along the ditch close by the driveway is what one first sees when approaching Verhildersum. Lots of plants have seeded in the gnarled trees. Of course, the börgbloumkes grow under the trees of the grove. Arum's lily and star-of-Bethlehem grow scattered about. What is most evident in the spring are the large bunches of wild garlic (Allium vineale) which scatter their typical onion odour around.
Even closer to the borg there is lots to see, as far as plants are concerned. Name boards are everywhere. Fish used to be bred in the 'castle moat' around the borg by earlier residents. Even now, large carp swim around in the trenches.

Everything zigzags in this part of Groningen. The roads, the dikes, the ditches and the Reitdiep, in particular. Close to a wide loop in the Rietdiep lies the tree-grown terrain of the Allersmabord, rectangular and straight. Tall rising deciduous trees hide the estate completely with their green leaves during the summer.
An amazing number of bats flutter around and above the area in the summer. Stinse flowers also grow here, just like on the other Groninger borg terrains, although not as much under the trees as in the moat. This is where one finds the farmer's crocus and the bluebell. Nor does Allersmaborg lack a heron colony, with all the fish-rich waters in the vicinity.

Ekenstein has been renovated into a hotel. Behind it lies an old park woodlands with winding paths, laid down in an English style long ago. This woods serves as a base of operation for many herons which look for food in the area. However, the area offers lots more: young planted woods, ruins from a stone factory, the borg Rusthoven and an old orchard on a plot that forms the old link with the dug-up wierde Bolhuis. A recommended walk via this orchard, the Bolhuislaan and the Zuiderweg takes you to one of the highest wierdes of Groningen, Wirdum. Fields lie west of the orchard, which are partially flooded during the winter: an eldorado for water fowl.