You can mark a favorite home, by clicking the heart symbol
under any vacation home. When you mark a home favorite, the heart will turn red
(ahhh, isn't that cute...). You can unmark a home favorite just by clicking the heart again.
You can always see your favorites by clicking on "Favorites" in the menu bar above. You can see your current search by clicking on the location in the menu bar above (just to the left of "Favorites")