Fly to Madrid, but our first stay will be in Avila. Then to Santiago de Compostela, Spain, the third most important pilgrimage site for Christians:

(photo credit: Fernando, Wikipedia)

Burgos, Spain;

Bordeaux, France;

Lyon, France;

Chillon and Gruyere, Switzerland;

Michelstadt, Buedingen, Germany;

Prague and Kutna Hora, Czech Republic;

Return from there to Tucson

Requirements: enthusiasm, open-mindedness, some historical interest, passion, and physical fitness (a bit of walking, but not strenuous).