Today we visited two unique and remarkable islands: South Plaza and Santa Fe. Early in the morning we woke up to explore the tiny islet of South Plaza. In addition to playful sea lions, for the first time we spotted the iconic Galapagos land iguana walking close to the trail, as well as a variety of sea birds flying along breathtaking cliffs. We then had some time to share a lecture onboard about the human history of the Galapagos, a fascinating but usually unknown topic in the Galapagos. In the afternoon, we moved to Santa Fe Island. This was a great opportunity to end the day watching a different species of land iguana, the Santa Fe land iguana which is unique to this island. The Galapagos National Park provides this kind of exciting opportunity to witness two species of iguanas on the same day and to reflect on the evolutionary processes that underlie all this biodiversity.