Like an increasing number of tourists visiting Nepal's mountain peaks, colourful markets and lush national parks, Marina Argeisa wanted to experience the latest must-do activity on the tourist trail: a volunteering stint at an orphanage. What the 26-year-old Spaniard did not know was that her good intentions were unwittingly feeding an industry that dupes poor parents into sending their children to bogus orphanages in order to extract money from well-meaning foreigners.