Time gate

A time gate is a permanent physical portal through time. There are only a handful on Faerûn and their locations are unknown to all except certain elven High Mages. The gates' exact age is unknown but they predate even the coming of the dwarves. The gates have the power to transport an individual to any point in the past, according to the wishes of the individual walking through. If no particular period in time is thought of, the individual is transported to a random point in the past. The effect of walking through a gate is otherwise similar to the time conduit spell.

An expedition to locate the lost time gates was conducted in 404 DR.

Locations
The only mention of the locations of the gates is made in Mystryl's ancient texts.

First gate
The first gate:

"...lies hidden upon the back of the mountains, where the ice and rocks touch the summer sky of Amaunator's belt. "

Amaunator's belt is a constellation appearing in the summer over the Spine of the World. The gate is within a deep cave and is guarded by a vain and greedy white dragon, who demands a hefty fee to allow anyone past.

Second gate
The texts state that the second gate is:

"...north of Novularond, shining bright upon Misken's Peak at Highsummer. "

Third gate
According to the texts, the third gate is at:

"...Andrio's Peak near the Garden of Eldath. "

The name of the peak is a misspelling and should have referred to Mount Andrus. The garden refers to Cedarsproke, a city in the Guthmere Forest.

Fourth gate
There is another gate located in Synnoria in the Moonshae Isles. This is not referenced in Mystryl's texts like the others, and only ten elves have ever spoken about the gate in thousands of years. Its physical form is that of an arch that is situated in a cave at the eastern end of Mirror Lake.