Orosi vs Orosí
I asked a group of Ticas about the pronunciation of Orosí, and they said this: the *town* is pronounced oh-ROH-si. But there is a Volcán Orosí that is pronounced oh-roh-SI! I looked for this volcano on my maps, and can *not* find it. I didn´t think until later to ask how the name of the *Valley* is pronounced. Oh well.
Of course, *all* of the above are spelled the same way: Orosí.
Update (July 22, 2008): I finally ran across an article about the volcano - it is in Guanacaste, no where *near* Cartago!
"The Orosi Volcano is one of the main natural treasures at the Guanacaste National Park..."