Why not take a trip to Lake Lagano. It's such an interesing place to visit at this time of year. Also, you'll find cheap accommodation.
One should use "a" when the following word begins witg a consonant. One should only use "an" when the following word begins with a vowel. You should not use either if the following word is a proper noun. You should also not use either if the following noun doesn't refer to a single thing(the following noun may be singular...but this doesn't always means it refers to a single thing)
