Mapbox has released a new version of their Maki map icons collection. The collection includes 114 different open sourced map markers which can be used with your interactive maps.
Each icon in the Maki collection is available in two sizes, 11px by 11px and 15px by 15px, and can be downloaded in SVG format. The new collection also comes with the Maki Icon Set Editor, which allows you to change the color and shape of the map icons so that they complement the design of your interactive maps. If you want to draw your own map, you can use this illustrator vector from image of World vector maps free.
Interactive map developers and designers might also be interested in the Maki Style Guidelines.
Another source for downloadable map icons is the Map Icons Collection. The Map Icons Collection includes over 1,000 different map icons in seven different styles. It is also possible to edit the colors of each of the map markers in the Map Icons Collection.
A third source for map markers is the Map Icons Designer. The Map Icons Designer includes 200 map icons which can be downloaded in PSD Vector Shape & PNG format. Source