The tropical climate of Bolivia's Oriente may be the last place you'd expect to find yourself surrounded by sand. In fact, clambering over dunes in any jungle seems highly unlikely regardless of where you are in the world. Behold, Las Lomas de Arena. Jutting out of the Amazon basin are geologically impressive sand dunes situated just 45 minutes outside the city of Santa Cruz de la Sierra, a must-see for anyone visiting the eastern lowlands. While it's no easy trip, a 4x4 is crucial and the road easily floods during rainy season making it near impossible to visit during a few months of the year, the stunning views and spectacular wildlife sightings make the desert excursion worth every effort.