I have not yet found a tool that presents the last saved location with other metadata from an Excel 2013 spreadsheet, but this information can easily be found by opening the "workbook.xml" file embedded in the parent spreadsheet. Simply changing the file extension from "xlsx" to "zip" and using a zip-extraction utility to extract the contents of the spreadsheet is a quick way to gain access to the embedded files without requiring any specialized tools.
Workbook.xml contains information about the Excel file such as worksheet names, window height and width parameters, and a bit of other information. For the most part, this XML file appears to be similar across files created using Excel 2007, 2010, and 2013, however, there is one key difference: the "x15ac:absPath" element. The "x15ac:absPath" element is a child element of "mc:Choice" (which is a child element of "mc:AlternateContent") and contains an attribute called "url" that corresponds to the last saved location of the spreadsheet.
|Workbook.xml file from Excel 2013|
|fileVersion Value to Excel Version Mapping|
|Excel 2013 Document Inspector identifies Last Saved Location Metadata|