I read one of the blogs where the blogger mentioned that while you are searching for a new place to visit, checking out the UNESCO World Heritage Sites can be a good direction to choose places.
Access this link which lists country-wise all Cultural and Natural sites.
It certainly prompts you to search for places to see in and around the site and you never know you will have a new interesting itinerary.
Thought to compile the list of UNESCO WHS that I have been fortunate to visit and links to them on my blog. Feel free to browse if they interest you.