Ana was a superb guide. Knowledgeable and personable. She met us off the ferry from Buenos Aires and guided us through the history and architecture of Colonia del Sacramento. By profession she is a history teacher which meant she was open to any questions, no matter how odd, and she tested us (gently) with a few of her own. In advance we had indicated an interest in the local wine and cheese offerings and local crafts. Throughout the hour she made recommendations on all of these interests. She walked at the pace of the slowest in our group (of 3) and do we never felt rushed. We each of us enjoyed the experience and learned a lot from an excellent guide. Highly recommended.