There are many maps that you can freely mark locations and save. Take Baidu Map as an example. The specific steps are as follows:

1. Open your computer browser and search Baidu Map on Baidu.

2. Click to open the Baidu Map official website and enter the Baidu Map homepage.

3. On the Baidu Map homepage, enter the place you want to go.

4. After finding the place you want to go, click the toolbox in the upper right corner of the map and select Mark.

5. Mark the location you want to mark on the map.

6. After the map annotation is completed, click Share on the upper right to save the map in your mailbox, QQ, OneNote, etc.

7. Taking QQ as an example, just go back and view the saved map. At this point, the map is marked and saved.