"Ala Viakunthapuram lo" means "In that City of Vaikunatha".
Ala - That
Vaikunthapuram -City of Vaikuntha
Lo - in
Here the word "lo" in Telugu comes as "in" before the sentence in English as in most of the Indian languages gramatically Subject and Object take reversing places.
Ex: In Hindi "Ghar Mein" is translated into English as "In the House"
These words are actually starting lines of a classic Telugu poem from Srimad Mahabhagavatham written by Telugu classical writer "Pothana" who lived between 1450AD to 1510AD.