The Helenental is a wooded gorge running west from Baden through the Vienna Woods, carved by the Schwechat river. The valley path — partly along the river, partly through forest — is one of the most rewarding walks in the region, passing two ruined medieval castles (Rauheneck and Rauhenstein) perched dramatically on limestone cliffs above the valley floor.
The full walk from Baden to the far end of the valley and back takes three to four hours. Easier options abound: a fifteen-minute walk from the town centre reaches the beginning of the valley proper, and the first castle ruin (Rauheneck) is visible within thirty minutes. The valley is also cyclable on the unpaved riverside path. In autumn the beech forest turns golden and the light through the canopy is remarkable. Beethoven walked here daily during his Baden summers, and the valley has changed remarkably little since his time.