All seventeen
Every place that made the long-list, in roughly the order we'd encounter them.
Some are near-certain (Lima, Cusco, Machu Picchu). Some are wishful thinking for a fourteen-day trip (Tambopata, Huaraz). All of them are here so we can argue.

Lima Coast
Lima

South Coast
Paracas

South Coast
Huacachina

South Coast
Nazca Lines

Southern Highlands
Arequipa

Southern Highlands
Colca Canyon

Southern Highlands
Lake Titicaca

Cusco Region
Cusco

Cusco Region
Sacred Valley

Cusco Region
Maras & Moray

Cusco Region
Machu Picchu

Cusco Region
Inca Trail

Cusco Region
Salkantay Trek

Cusco Region
Rainbow Mountain

Amazon
Tambopata

North
Huaraz

North
Trujillo
By region
Or sorted by where they sit on the map, if that helps the argument.
Lima Coast
- Lima2–3 days
South Coast
- Paracas1–2 days
- Huacachina1–2 days
- Nazca Lines1 day
Southern Highlands
- Arequipa2–3 days
- Colca Canyon2 days
- Lake Titicaca2–3 days
Cusco Region
- Cusco2–4 days
- Sacred Valley1–3 days
- Maras & Moray0–1 days
- Machu Picchu1–2 days
- Inca Trail4 days
- Salkantay Trek5 days
- Rainbow Mountain1 day
Amazon
- Tambopata3–5 days