Lysakerelven
... that the Norwegian river Lysakerelven, an ecosystem of national importance, has walking and cycling trails on both banks from its source to its mouth at the Oslofjord?
... that the <a href="./Norway" id="mwGSM" rel="mw:WikiLink" title="Norway">Norwegian</a> <a href="./River" id="mwGSQ" rel="mw:WikiLink" title="River">river</a> <b id="mwGSU"><a href="./Lysakerelven" id="mwGSY" rel="mw:WikiLink" title="Lysakerelven">Lysakerelven</a></b>, an <a href="./Ecosystem" id="mwGSc" rel="mw:WikiLink" title="Ecosystem">ecosystem</a> of national importance, has walking and cycling trails on both banks from its source to its mouth at the <a href="./Oslofjord" id="mwGSg" rel="mw:WikiLink" title="Oslofjord">Oslofjord</a>?