Day 37
Bus to Cao Bang
Bus to Cao Bang
Bus to Hanoi.
Overnight bus from Phong Nha to Ninh Bình.
Visit Trang An Grottoes.
Hired a scooter.
Visited Paradise Cave and Botanical Gardens.
Bus to Phong Nha.
Visit Phong Nha Cave.
Bus to Dong Hoi in Vietnam.