In Chinese custom, 1 month after the end of Chinese New Year is Tomb Sweeping Day. In Taishan though, offerings to ancestors can be made any time during the entire month instead of that single day. This is in part due to the large overseas population who want to return to make offerings but obviously can't all pick a single date. Hence during the entire month, people hike up mountains not only make offerings to their own ancestors but also join in on those of neighbors and friends. You will see the typical decoration of grave sites, burning of paper money, firecrackers and so on. But afterwards, it's a feast of roast meats (most often goose and pork) and cakes. It's a sign of respect when others join in with Taishanese on their offerings and they would feel especially proud if a foreigner "gwi loe" made the trek with them. So if you're in Taishan during this month, make friends with locals and join in.
"Water Tower", 水中碉楼 Shuǐzhōng Diāolóu
Nearby Kaiping is famous for its diaolou watchtowers built in the early 20th century by overseas Chinese, but Taishan has quite a few as well. This one was flooded when a reservoir was constructed, leaving only the top few stories sticking out of the water. Nearby is a village that was spared from flooding, where the cows still graze on the sloping side of the dam.
台山博物馆
台山市华侨文化博物馆
Large modern museum with exhibitions on the many Chinese people who migrated overseas from Taishan.