If you only have time to visit only 1 temple in Penang - make it the Khoo Kongsi Temple. This is one of the most impressive temples on the island, and it has been fully restored to its original glory.
The Khoo Kongsi is one of the clan associations in Penang which still exist up to the present day. It is one of the wealthiest and most power clans, and like most of the clans associations with money, they build impressive buildings to show off and perpetuate their power. Getting to the Temple is not easy as it is hidden behind a maze of shophouses. Find the small entrance along Lebuh Acheh. Once you see the Acheh Street Mosque with its distinctive tower you are on the right track.
After you pass through the narrow street, you will come to the temple and see it in its full glory.
The intricate carvings and decorations are just amazing.