If there is a file named index.html, that HTML document is returned. The address may also specify a location in the document to go to. There is a name tag at the top of this document and you may use link to go to the beginning of the page. This location does not have to be within the current document. This part is displayed by the browser.
Most browsers can view two different types of graphics files.
These two different file types have different strengths and weaknesses. The figures may be located at any location on the web, you just have to create a link to the file. Keep in mind that graphics files may be very large. This causes very slow downloads that may try a reader's patience. Graphics files may be found by searching the web.