Shepaints
Costa rica is most acclaimed for the beauty and diversity of it's natural environment and for its gentle climate.
I have been there three times and LOVED it. At one point I was considering it as a possible retirement site.
It is a lovely country and the people (who call themselves 'Ticos') are generally quite friendly to Americans and other tourists.
Naturally, if you speak Spanish you have a big advantage but most tourists do not and have a nice time anyway. Tour guides speak English of course as do most hotel clerks and those who deal continuously with tourists.
What you see and do depends of course on your interests, fitness, budget, time available etc.
Possibilities include: white water rafting, nature tours, jungle tours, beach-going, horseback riding, etc.
There are both live and dormant volcanoes that are big tourist attractions. In the north there are beaches where giant turtles come ashore to lay their eggs,
there is a chair lift that one can take to ride through the jungle canopy to look at birds, butterflys, monkeys etc.
Bird watchers will really enjoy themselves.
Make sure you get a good Costa Rica travel guide like the one published by Lonely Planet (I got several at Barnes and Noble but liked the LP best) They also have a useful web site. (below) Make sure you take prudent precautions for the protection of your valuables* as petty thefts can occur (The same as if you were visiting a large U.S. city. The travel guides cover this issue very well and provide important tips.
http://www.lonelyplanet.com/destinations/central_america/costa_rica/
The 'Tico Times' is an English language weekly newspaper published in CR. It is mainly directed at English speaking residents of CR but has useful information for tourists as well. The online version is at:
http://www.ticotimes.net/
I think the best strategy for most people, for a first time visit, is to look for a package tour that includes day trips and/or multi-day side trips to different
areas, sights, and activities. Good tour guides (and I never got a bad one) can add immeasurably to your experience. Mine were a 'gold mine'of information on history, customs, ecological issues, flora and fauna etc.
Caveat: Most of the good stuff is OUTSIDE the capital, San Jose, don't spend too much time there and neglect the best part of the experience of CR. You can see the highlights of the city in a day or two.
Places and things I enjoyed:
-The Arenal Volcano (an active volcano)
-The Monte Verde cloud forest
-Manuel Antonio
(a national forest right up against the sea, also nice beach, restaurants, clubs, etc. nearby)
-A day trip canoeing in the jungle
-A day trip to the old capital, of Cartago and the world
famous Lankester Botanical Gardens.(see link)
http://www.ucr.ac.cr/~jbl/
Finally, Costa Rica has many wonderful Country lodges or bed and breakfasts in beautiful country settings. They all can help you arrange day trips, tours, etc.
In my opinion the best accomodations in the capital are also at B&B's or in small European-style (or boutique) hotels. They are typically much more interesting than the big hotels. Of course if you want to feel like you're in LA or Miami you can find a Marriot, Holiday Inn etc.
Personally I think the big hotels are boring.
Final word,
Do your reading, do your homework and you won't be sorry. It'll add immeasurably to your enjoyment of your stay.
Have a nice trip! jjorge
* PS
This is true no matter where you go but the Carribean coast eg. around Limón is reported to have a somewhat higher crime rate.