National Geographic came up with this list a while ago, citing the most ruined destinations resulting from extreme popularity. Here are some comments from people who have visited them.
1. Cancun, Mexico
Sarzmc in CancunThe colour of the water was amazing – I can see why hotels were constructed there in the first place. However, now they really wreck it – not only are they all jammed up against one another, they also haven’t left much actual beach to lie on! - Sarzmc
2. Santorini, Greece
Deannekristen in SantoriniThe ferry cruises by the youngest part of the volcano on one side and cliffs on the opposite side. The cliffs are hundreds of feet high and have a shear drop off. Apparently, a portion of the center of the island slumped into the earth when the volcano erupted last. – Deannekristin Read the rest of this entry »