Iceland Travel Warning

This is a different warning than I'm used to:

"Extreme care should be exercised when touring Iceland's numerous nature attractions, which include glaciers, volcanic craters, lava fields, ice caves, hot springs, boiling mud pots, geysers, waterfalls, and glacial rivers. There are few warning signs or barriers to alert travelers to potential hazards. Several tourists are scalded each year because they get too close to an erupting geyser, or because they fall or step into a hot spring or boiling mud pot. High winds and icy conditions can exacerbate the dangers of visiting these nature areas. Hikers and backpackers are well advised to stay on marked trails, travel with someone, notify a third party about their travel plans and check weather reports, as there are often no means of communication from remote locations. This is especially important as weather conditions in Iceland are subject to frequent and unexpected changes. Those planning visits to dangerous or remote locations in Iceland are strongly encouraged to register with the U.S. Embassy before beginning their journey and to leave a travel itinerary with local guides/officials if planning to trek through remote parts of the country."