How to get here

Car: A2 - Locarno - Direction Valle Maggia, Centovalli, Onsernone until Spruga (turning round area)
Train: Locarno - Bus to Spruga (Onsernonetal). SBB
 
From there a 45 minute hike (follow the signs towards Aple Salei) will take you to Piansecco. 
Download the map.

Map: