However, the location and appearance of the power source was forgotten, because in the past, it stopped producing electricity.

Over time, the once powerful fortress fell into ruins, and its location was forgotten.

The Temple's exact location was forgotten, although by the 20th century scholars had a good idea where to look for it.

Eventually the tomb fell into ruin and its exact location was forgotten.

If they remembered the trivia, however, its location was forgotten.

However, with the passing of years, their exact location has been forgotten.

Although the location is nearly forgotten, it has a central role in Norse mythology.

As time passes, the location of landmines is often forgotten, even by those who planted them.

The location at which the ship rested was forgotten over time, and was covered by the moving river.

During the early fifth century, the body's location was forgotten.