PARO, BHUTAN - APRIL 15: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge half way on their hike to Paro Taktsang, the Tiger's Nest monastery on April 15, 2016 in Paro, Bhutan. (Photo by UK Press Pool/Getty Images)
PARO, BHUTAN - APRIL 15: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge half way on their hike to Paro Taktsang, the Tiger's Nest monastery on April 15, 2016 in Paro, Bhutan. (Photo by UK Press Pool/Getty Images)