This is the 12547th most frequent Korean word.
대만도
"대만도" is not a standard Korean word. If you meant "대만," it translates to "Taiwan" in English.
In this sentence, '대만도' (Taiwan too) indicates that Taiwan is another place, among others, worth traveling to.
대만도 여행하기 참 좋은 곳입니다.
Taiwan is also a great place to travel to.
Here, '대만도' (Taiwan also) signifies that Taiwan, like Korea, possesses diverse cultural aspects.
한국 외에도 대만도 다양한 문화를 가지고 있습니다.
Besides Korea, Taiwan also has diverse cultures.
In this case, '대만도' (Taiwan as well) is used to imply a recommendation for visiting Taiwan, along with Japan.