Riding a motorbike through Lautan Pasir (the "Sea of Sand") in the Tengger Caldera..

This very soft sand is actually thin volcanic ash, and there is about 5 Km of it to go through.

That's my rented motorbike: a Honda Supra 125cc Semi-Auto (4 speed) with disk brakes. It's an excellent little bike that really goes everywhere, does great on dirt roads and uses little gas. It's a popular model in Indonesia. My backpack is in the white rice bag, and I have two 5-liter jerrycans of extra gas in side pannier bags.

For more information about the Bromo Tengger Semeru National Park, read en.wikipedia.org/wiki/Bromo_Tengger_Semeru_National_Park