You are right Basecamp is much better for POI manipulation than MRA and in the properties tab for the waypoints you can set a Garmin GPS to give a proximity warning. If you use POI loader to load these points onto your Garmin GPS you can set the proximity warning universally for a group of POI's such as these hotels. One reason why I still have the ZumoXT mounted above the Clocks on My Africa Twin.
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In addition, were a POI file contains several columns of information notes tab in the POI these are concatenated into information notes. Also you can see that the point was obtained from Open Street Mapping and if yo click on that you will be brought to the waypoint location on OSM.
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You can do it in MRA as Richard demonstrated above just by uploading the GPX file as a POI under route lab.
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This dialog pops up and you select your GPX or CSV.
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For the Paradors 31st of July GPX this information is displayed when you click on the POI. The import has correctly Identified the Lat/Long and name of the Parador. The rest of the information is lost.
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For shits and giggles I asked Google Gemini to get me a list of Paradors in Spain arranged into a CSV which MRA can up load (it came up with 97 with some missing from the existing list and some new ones!). To (slightly) enhance the information displayed by MRA I joined a description column with the name column as MRA can only display Latitude Longitude and a name the dash shows the split between the name and description and looks like this.
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This is how the enhanced info is displayed
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This is the area of interest with both lists turned on
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and with only the July 31 List.
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As usual with these things if information is sourced by different methods you get a different result.