
Jacob K. answered 10/14/22
Software Engineer with Experience Teaching and Tutoring All Ages
If you are just using HTML and CSS you will only be able to add interaction in the form of links. For example, you could have part of the map link to a new page that has more information about that place on the map.
However, if you want more interaction, such as changing the information on the same page when you hover over or click on something, you will need to add JavaScript (this can be added directly into an html file with the <script> tag or in a separate file).