Lake Titicaca is located in the Puno province of Peru and crosses into the Bolivian Territory. The lake is the highest navigable in the world being at 12,500 feet (3,810 meters) above sea level. Other specs in reference to the lake are that is covers 2,200 square miles (8,300 squake km) and measures 50 miles acrross at its widest point. The average depth of the lake is of 350 feet (107 meters).
This Peruvian Landmark is knows for is pure natural beauty. The landscapes surrounding the lake posses a unique diversity, from parts of the lake you can see farmlands un the foothills of snow-capped mountains and also the islands within the lake itself.
Some of the most improtant and well known of these islands are the floating Uros Islands. These are a group of man-made islands comprised of reeds, there are whole communities which actually inhabit these floating artificial islands. One of the major attractions is the island of Taquile, it posseses a hilly formation and is located 35 kilometers east of Puno; Taquile boasts pre-Inca ruins and agricultural terraces.
The Lake also posseses a strong spiritual and cultural significance with the local communities. According to local folklore it is from the waters of Lake Titicaca the the Inca originate from and the Aymara before them. Surrounding the region you will find archeological sites as well as ancient monuments left by these ancient cultures.
Sources: Lake Titicaca
Sources: Peru Travel Information