11 day trip with Odysseys Unlimited "Exploring Iceland".
Waterfalls (foss in Icelandic)
Skogafoss
Seljalandsfoss
Dettifoss
2 kilometer round trip walk over rough terrain to get to DettifossHraunfossar (fresh water springs flowing out of porous layers of lava rock)
Gullfoss (see 2 men in bottom left corner of photo for scale)