Time Portals
From Zelda Wiki.org
Time Portals are portals found in Oracle of Ages that are able to transport anything anywhere in time. Time portals are created/opened in the game when Nayru opens/creates them or the Tune of Echoes is played using the Harp of Ages.
Locations
Portals are most prevalent in Lynna City, Talus Peaks and Crescent Island. Link encounters fewer portals as he proceeds on his quest, however by this time he will have learned to play the Tune of Currents and the Tune of Ages, which allow him to travel forwards and backwards in time without needing to use the portals.
