What's the scientific details for? Identification? Habitat details (if this is what your aim is - you're better off with the links I sent you, textual information only can sometimes be pretty vague)?
The most accessible on the web for orchids in general would be Jay Pfahl's Internet Orchid Encyclopedia (Internet Orchid Species Photo Encyclopedia
Costa Rica isn't going to have many of the "Jewel Orchids" you see commonly for sale (e.g. Dossinia, Macodes, Anoetochilus, Ludisia).
Plants such as Dossinia spp., Anoetochilus spp., Ludisia spp., Cheirostylis, and Macodes spp. come from Asia and Australia.
Malaxis can be found in Asia, Australia, and parts of South America (but probably not in Central America).
Goodyera spp. and Zeuxine spp. can be found in both Asia and North America (actually Zeuxine is more of an Asian genus of "Jewel Orchid", with Zeuxine strateumatica being an accidental introduction to America - through grass imported from China of all things).
The only Central American "Jewel Orchids" you'll probably find belongs to the genus Cyclopogon, Pelexia, Stenorrhynchus, and a couple others that I forgot the names to at the moment. These are less spectacular looking as far as leaf patterning are concerned. They tend to be able to blend in with other plants in the surrounding area with the greatest of ease.