Time Portals are items from The Legend of Zelda: Oracle of Ages. These portals allow Link to travel from the past to present and vice-versa. In order to use a Time Portal, Link must activate one of the preset portals using the Tune of Echoes. Once Link has obtained the Tune of Currents, he can actively open a Time Portal anywhere throughout the past Labrynna, provided that the destination is not blocked by an object or person; if he travels through time and appears on one of these, he is returned back to the past. The Tune of Ages allows him to do this in both times.
The location in which Link arrives is marked by a glimmering return portal, which can be taken to return to the opposite time. These portals are very similar in appearance to Dark World return portals from The Legend of Zelda: A Link to the Past.