Seljalandsfoss, Route 1 and Þórsmörk, Iceland
Seljalandsfoss is Iceland's most famous famous waterfall, noted both for its beauty and its 200ft cascade. Even though Seljalandsfoss is one of Iceland's most popular tourist attractions, the area is rarely crowded—you may meet a few people in the parking lot or on the soggy trail behind the falls, and that's about it.
Seljalandsfoss is also one of the country's most accessible sites, just a few hundred yards from Iceland's main track of road, Route 1. If you're lucky, you'll visit on a clear, sunny day. Conditions during our visit were suspect at best. This is as close as I could get to the falls without having the wind whip the spray all over my equipment. Not to say that Seljalandsfoss isn't worth visiting under any conditions—this is Iceland, and the country is always impressive.