Back in April 2016, my family trip brought me to South America, and in crossing between Bolivia and Peru, we decided on availing of services by Bolivia Hop. On our day with them, we stopped at a viewpoint near the Tiquina Strait overlooking the smaller section of the lake. It was truly a beautiful scene of the green fields tumbling down into the lake. We then reached the strait, where the bus (without us inside), was floated on a raft to the other side, the Copacabana peninsula. Finally, we arrived in Copacabana in time for lunch, a little time to chill by the shore, and of course, a short tour by boat to Isla del Sol. Unfortunately, as my family was unwilling to walk or to separate from me, I wasn't able to hike the trail across the island, but I was able to climb up to a small Inca structure by the pier and walk on the preserved Inca path.
The lake appears to be on the T-list as a mixed site, which is interesting. The various Inca remains on the islands and the pleasant little colonial towns on the shore can constitute a complete site. The whole lake can even be seen as a cultural landscape with many common themes between the minor sites between them. While I'm unsure of exactly which natural aspect the basis of such a claim would be, but it's safe to say the lake is quite a phenomenon in its history, cleanliness, size, and altitude. Titicaca as a whole is just a site of extraordinary beauty, importance, and phenomena, and it definitely does contain OUV in multiple aspects. The land around the lake is a bit of an agricultural landscape as well, while the numerous Inca sites are all well-preserved. Copacabana is said to have a nice church, but unfortunately, I was unaware of it at the time, and I therefore was unable to go in. Lastly, the pristine state of the lake itself supports a diverse ecosystem, probably with many endemic species of fish, and other fish, such as the trout that we were served in the restaurant.