A total of 10,000 people turn 65 each day -- and many of them who retire want to make the most of travel opportunities. In my new book, '65 Things to Do When You Retire: Travel,' I invited a world-class collection of writers and travel experts who are literally from all over the world to offer practical, inspiring advice about how to have the time of your life.
Lonely Planet's team of several hundred expert authors and editors -- and even Lonely Planet co-founder Tony Wheeler -- have been banging heads to find the answer for our annual set of travel picks for the year to come, the Best in Travel 2013. So, city-lovers, without further ado, our picks for the top 10 cities for 2013 are...