Info I have worked on/sites I have found for the IIT Summer Spain/Portugal Trip:

Trip Info for Reference

My blog about the trip

Hostelling International Card (needed to stay at HI Hostels)

STA Travel Card (for saving money at museums, recommended by professors)

Lodging Spreadsheet - Excel Spreadsheet (spreadsheet of hostels with info from Hosteling International)

Lodging List - List of Hostels that some people are staying in.

Aer Lingus - $700 airline flights from Boston or New York

Map of route of trip with all the locations where boarding is supposed to be found:

map