Lima itself isn't much of a holiday spot but it's the main gateway to the rest of Peru and Boliviia, most notably for Cusco and Machu Pichu as well as Lake Titicaca, Arequipa, Salar de Uyuni etc.. Mancora is also a good beach resort not too far (relatively) from Lima.

These places have been on the backpacker trail for decades but they are now increasily popular with high-end tourers, adventure honeymooners and so on.