emaij I was in Turkey in June - very hot but great. Just drank bottled water constantly.
SRQ Guy Costa Rica is also great. I used to live there and the people are so friendly and the lifestyle is great. I would say Costa Rica is best from Oct-Apr.
Visit the east (Caribbean) coast, the central jungles, Arenal Vocano (definately must relax in the hot springs) and then down along the Pacific coast.
Depends on what you want.
drtravels I would have to diasgree about skipping Istanbul. I absolutely loved it and found the Aya Sofia inspiring. But I guess we can each have our own opinion, right. I would have to support your other ideas 100% though.
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I Love New York