"A question. Since before your sun burned hot in space, and before your race was born, I have awaited ... a question." STOS, Ep. 28.
While not quite the time portal portrayed in science fiction, this gate mimicks the Guardian's distortion of time. By remaining chained and locked for years the Guardian has kept this wooded area secure from development. But for how long as the property is nearing sale.
Before leaving this 42N country relic it seemed to say, "Time has resumed its shape. All is as it was before," and added, "Many such journeys are possible. Let me be your gateway." Know that.