Fishing although there is nothing organized as of yet. Mondulkiri's rivers and streams would probably make for some good fishing. Bring your own lightweight gear and give it a try. Sen Monorom would be a great place for mountain biking. There are now no rentals there, so you would have to bring one along on the airplane.
One of the popular tourist attractions in Mondulkiri, the Memang Gold ...
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Chroy Changvar Bridge in Phnom Penh or Cambodia-Japan Friendship Bridge ...
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