The rusty and rickety watch tower atop the hill was the 1.5km-away goal of my hike. Ordinarily, in a more temperate clime, I probably wouldn't have even broke a sweat on a walk of that length. In the humidity of coastal Vietnam, however I dehydrated and sweated like a stuck pig. Thankfully, the 70-or-so-foot-tall tower caught a slight breeze, which made the whole thing tolerable.
Location: Cat Ba Island National Park, Vietnam
Lens used: 24-105mm f4.0 IS