Macau Outer Harbour from Guia Hill. Guia Hill is the highest hill in Macau Peninsula. It is 90 m above the sea level. Published August 22, 2017 at 4320 × 3240 in Macau private tour checklist ← Previous Next → Macau Outer Harbour from Guia Hill. Guia Hill is the highest hill in Macau Peninsula. It is 90 m above the sea level. Macau Outer Harbour from Guia Hill. Guia Hill is the highest hill in Macau Peninsula. It is 90 m above the sea level.