Web browsers keep a record of the websites you visit in a section of the browser usually called "History." In Internet Explorer, your browsing history is saved in such a section, so if you visited a website previously that you now can't find, the History section is the best place to look.
Click the "View" menu in Internet Explorer.
Move your cursor over "Explorer Bars."
Click "History," select your viewing option ("By Site," "By Date," "By Most Visited," "By Order Visited Today" or "Search History"), and then double-click the desired history entry to visit the website.