I had the most amazing tour with Frank through Four Worlds. The itinerary was fantastic and Frank always knew fun and interesting activities to do in addition to what we had planned - this was the true insiders experience. I've never had such a knowledgeable tour guide. and because of this wonderful trip I truly fell in love with Ecuador. I can't wait to come back and take another Four Worlds trip - I wish they offered itineraries all over the world. They tailored the itinerary to my interests and had an extensive breadth and depth of knowledge- all shared in a fun and interesting way. This was the trip of a lifetime, I'll remember it forever. Couldn't recommend this any more highly, they nailed it!!