Bokeo: Home to the Bokeo Nature Reserve, a protected forest area created to preserve the black crested gibbon. Elephants, bears and tigers have also been spotted here and it houses The Gibbon Experience – a popular eco-tourism activity where participants traverse the forest by zip-line. Flights run seven times weekly from Vientiane to Houayxay Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays and Sandays.  Adult prices start from 399,000 kip one-way.