你有機會也可到此一遊的英文是甚麼??????

If chance come here, you may get a travel.

You can visit here/there if you have a chance.

If you have an opportunity, you can visit there, too.

2014-01-13 23:18:43 補充：
sorry,漏左個once

If you have an opportunity, you can visit there once, too.

You can have a chance to visit here/(somewhere) once