This “smart” travel guide is about magical LANDMANNALAUGAR rainbow-like colorful mountains in ICELAND, located in the heart of Highlands. The book describes in detail 12 half- and full day hikes, plus, the most famous multiday trekking hikes - Laugavegur Trail (52 km) and Fimmvörðuháls Trail (26 km). It contains ~120 GPS coordinates of important to know places in ICELAND and in LANDMANNALAUGAR, ~80 website links, covering: best viewpoints, campsites, mountain huts with detailed info and prices, hiking trails around, geology of the place and 3 maps. The book first describes how to get to ICELAND with a ferry from Denmark or by air, then, how to commute within ICELAND with a bus, a rented car or hitchhiking, after that I give the most important advice how to survive as adventurous hiker, how to safely do multiday trekking in dangerous Highlands, and then finally, I review in detail hiking trails with important sights around. This is a unique and the most complete "smart" travel guide, which I made, at first, to be solely used in my own, after buying so many travel guides and still feeling - they aren't good enough for my adventures to explore wilderness as a biologist and wildlife/travel photographer. I was missing it during my 4 expeditions in ICELAND, 2015-2018, otherwise, I would be much more efficient as a landscape/wildlife photographer and traveler. This is my 5th book in the “wilderness explorer” series, and the second about ICELAND. First three travel guides were about PATAGONIA (1st book Peninsula Valdes Nature Reserve, 2nd Torres del Paine National Park, and 3rd Tierra del Fuego Land).The book can be equally useful for "budget" adventure seekers, solo/group travelers, in "fast & easy" style with a rented car/campers or travel agency users as well as for paid wildlife and travel/landscape photographers on a mission. I hope the book will be a good “practical tool”, an all-to-know set of guidebooks for you (for me as well), while you are exploring the world with responsible mind and open heart as a truly nature lover.