Unit 7 Lesson 1 covers talking about travel experiences using the present perfect tense with superlatives. The lesson introduces vocabulary for describing nature and unique experiences. It explains how to use the present perfect tense with superlatives to emphasize that something is the most extreme of its kind experienced. Examples are provided like "This is the best beer I've ever drunk" and students practice rephrasing sentences in this structure. For homework, students complete exercises on pages 92 focusing on using the present perfect tense with superlatives when discussing travel.