Can i take a cab to the nearest watertown from shanghai or suzhou.

Which watertown do you mean? Zhujiajiao Water Town, Zhouzhuang or Xitang?

Any one among these four Tongli, Zhujiajiao, Zhouzhuang or Xitang waterfront. I wish to visit the one that is faster to reach. And also is there any taxi back to Shanghai. I am doing a day trip.

As for the nearest one, it should be Zhujiajiao Watertown, which is located in the city and easy to reach. Here is the transport:
1. Take Huzhu (Shanghai-Zhujiajiao) Special Line at Laochengdu Road Yan'an Road and get off at Zhujiajiao Station. The bus runs between 7:00 and 17:45 to Zhujiajiao every 10 minutes, and returns from 5:50 to 17:15.
2. Take Shangzhu Line at Shanghai South Railway Station or Shangtai Line at North Caixi Road Bus Terminus to Qingpu Bus Station first. Then there is a bus every 10 minutes to Zhujiajiao.

Apart from that, you can surely take a taxi for round-trip to visit the watertown. It is relatively easy to take. Don't worry!

Tks Nelson.