For those interested in improving their knowledge of liturgical sources, or really advancing in Latin, I recommend looking into the Liturgical Institue at Ealing Abbey, London, England.
Classes are taught in two week blocks, fitting neatly into a holiday schedule. Locals can commute by tube, or there is reasonably priced and comfortable accommodation on-site.
Ealing is a beautiful area of London, full of Victorian houses. The monks of the Abbey chant the Divine Office daily, and there are a number of daily Masses to choose from.
Course fees are low--and even lower when taken for graduate credit from the Catholic University of Leuven.
More information here.
Kathleen Pluth, S.T.L., hymn writer, catechist, and schola director