Leader of the Opposition (LoP) in the Lok Sabha and Congress leader Rahul Gandhi on Tuesday rode Kerala's longest zipline in a bid to boost tourism in landslide-hit Wayanad. His visit to the zipline situated at the Karapuzha dam site came a day before Wayanad went to bypolls to decide his sister and Congress leader Priyanka Gandhi Vadra's fate in the Wayanad Lok Sabha constituency.