In terms of man-made historic sites, Tainan and Taipei probably have the highest concentration. Iād say Hualien, Yilan, Taidong are worth going as well.
Although you have been to Kaohsiungās Former British Consulate, many of them have the same kind of feel.
In Tainan you would find An-ping ruins (former Dutch Fort Zeelandia), near by there are a couple of Qing era European trade houses, a really famous one is the Tree House, where an entire building is slowly being covered by a giant tree. Near by youād find the An-ping old district, and itās pretty fun to wonder inside it. By the way, this place is where Taiwan got its name. Thereās also Yizaijincheng, a Qing era cannon fort near by.
Going a bit farther south, youād get to Sicao, where you a take a short boat ride through the mangroves or all the way back to Tainan City. It was a major battle field between the Dutch and Koxingaās armies. The temple there by the dock was built to ease the souls of nameless soldiers, and thereās a burial for unnamed Dutch soldiers next to the temple.
Theyāve painted it recentlyā¦
Sicao Mangroves
At down town Tainan you can find the oldest Confucius temple in Taiwan, worth going to. Near-by thereās Japanese era Martial Art House, and Taiwan Literature Building, which I highly recommend. The building served as Tainanās City Hall during the Japanese era.
I donāt know if Chikanlou (former Dutch Fort Provincia) is worth going to, but the Qing era Wumiao (martial arts temple) I think is pretty amazing. I also find Wufeimiao (burial of the wives of the last Ming dynasty Emperor) pretty unique as well.
Finally, a new National Museum of Taiwanās History in Tainan is pretty amazing too.
nmth.gov.tw/enmain/
zh.wikipedia.org/wiki/%E8%87%BA% ā¦ 7%E7%94%A2
thereās a good list of Tainanās historic sites on wiki
Although really, historic sites are only fun when you are interested in the historic stories, otherwise you have to really enjoy classical architecture.
There are so many more in other citiesā¦ I guess Iāll leave it for another day. Although I have to say I have very fond memories of Taidongās National Museum of Prehistory and the Puyuma Prehistoric Culture Park next to itā¦ Old distric of Taipeiās Sanxia I think is worth going to alsoā¦