For a really exiting international experience. Montreal. The only North American city in the top ten bicycling destinations.
http://www.velo.qc.ca/en/event/bikelabmtl-home
http://r20.rs6.net/tn.jsp?e=001bCilbPbiQdf437nwhVap6HNgFvnk9SFzcRedd1wo0vHMAYXtdMDlreuu8SvASeAHkWfGgJsAh8IAZ0zuKbJHMv3OGcRB3jYC5_wLHFazZPyXYlLuSz8C39E8g1IZWMBXhIfulbqyzwNYr26EQyBw9fTaYjpf-Zu6