Ireland is gifted with a spectacular coastline, but it doesn't get more iconic than at Cliffs of Moher. Here the green fields break off in a sheer drop of more then 120 m into the Atlantic Ocean. The cliffs stretch for about 8 km and reach up to 214 m at the highest point near O'Brien's Tower. Since Cliffs of Moher is one of Ireland's most popular tourist sites, expect a crowd near the main viewing area, which also holds the huge parking lot, visiting centre, and some souvenirs shops. For bit more solitude and thrill, trek along the cliffs in south direction. Here are no fences and, if you dare, can peek over the very edge - but be careful, death from falling are not uncommon.