Turn right onto Calle Reina Sofía, passing the Coviran supermarket and then the Florida bar (both on the left) until you reach Plaza Mirador de Víznar (on the right)* 
Park here temporarily and look for a narrow alley on the left, signposted Plaza Las Escobas. Unload the car and carry your belongings up the alley. Forty meters up the hill, on the right, you will see the sliding glass door which gives access to five of the Aguas de Víznar apartments. The sixth apartment (5/Las Minas) has its own private door at street level at the lower end of the building. 
Once unloaded, use the small street that encircles Plaza Mirador to turn around. Go back up Calle Reina Sofía until you reach the intersection you originally stopped at. Turn right here and go up a steep street called Calle de la Venta. At the top of this street, in front of you, are the gates to a small parking lot. Go in and park. When leaving the parking lot on foot, turn left and follow Calle Trans Alhambra. Towards the end of this street there is a fenced-off area. Turn left, keeping the fence on your right. Keep right and go down to the street below, then turn right. You are now in Plaza las Escobas and the hotel is down the hill on the left.

*It is not recommended to drive any further down Calle Reina Sofía as you will immediately enter a one-way system with no convenient parking spaces and will have to drive all the way around the town to get back to the centre.