I hiked from Escaldes (start from Hotel Muntanya on Avenida Carlemany close to the square with the Carmen Thyssen museum), there is a signboard Cami de la Canaleta, this is the shortcut that leads to the Repsol gasoline station, cross the road, and continue steep uphill on Cami de la Muntanya, this leads you in about 45 min to the official entrance with signboard of this UNESCO site. Around here is also a big parking, it is the same road that passes here to Engolasters, first the village with the San Miquel church, then the lake. But just to say: You can do it without renting a car in Andorra which was in my case impossible on an extended weekend Andorra was loaded with tourists, mostly from neighboring Spain. About 30 minutes into the hike from the parking comes the first waterfall, and stone houses as well.