Lake Ontario

Lake Ontario is one of the five of North America. It is partly located in the state of New York and notably harbors the secret S.H.I.E.L.D. facility known as the Lighthouse.

Project Reclamation
In the framework of Project Reclamation, S.H.I.E.L.D. officer and General Rick Stoner spearheaded the creation of the secret facility which would be known as the Lighthouse. This underground facility was located beneath a real lighthouse on a small cliff on Lake Ontario. Despite the Lighthouse being underground, Stoner managed to grant access to aircrafts: a small part of Lake Ontario could be emptied, giving the aircrafts access to a landing bay.

Secret Base
When the Hydrogen Wave Crisis was solved, the Lighthouse was abandoned and no one knew about the secret Lake Ontario facility any longer. Years later however, the Inhuman Robin Hinton guided the Chronicom Enoch to the facility. Enoch in turn informed his fellow Chronicom Noah about the place and both the Chronicoms settled in Lake Ontario to monitor Earth activities. Enoch later took Leo Fitz, Lance Hunter, Polly Hinton and Robin to Lake Ontario so they would be safe from General Hale.

Upon returning into their time, S.H.I.E.L.D. made the Lake Ontario facility their primary base of operations. Daisy Johnson discovered the secret underwater landing bay and opened it when her teammates returned from the St. Louis Aerospace Facility with the massive Zephyr One. Later, Deathlok also brought a Quinjet full of S.H.I.E.L.D. agents beneath the lake's surface.

The S.H.I.E.L.D.'s Zephyr One briefly left Lake Ontario while they were searching for Gravitonium and when they attempted to capture General Hale. . Melinda May returned the Zephyr One to Lake Ontario and informed her colleagues of Phil Coulson's capture, so Quake and May left to find Robin while Yo-Yo Rodriguez, Leo Fitz and Jemma Simmons later left Lake Ontario with a Quinjet. With Robin's assistance, Quake and May successfully rescued Coulson and Glenn Talbot and returned the Zephyr One to Lake Ontario. They left again for an Attack on the HYDRA Preparatory Academy and returned to Lake Ontario following the Infiltration into the HYDRA Herefordshire Facility.

In an attempt to reclaim the Gravitonium from S.H.I.E.L.D., Qovas took his spaceship over the shores of Lake Ontario and laid siege on the Lighthouse. However, his attack failed due to Talbot who infused himself with the Gravitonium, killed the Remorath soldier and flied himself and Coulson on a concrete chunk to infiltrate Qovas' spaceship, who remained over the lake. The Zephyr One later left Lake Ontario to join the spaceship who had left for space, and returned following the destruction of the Remorath spacecraft. Finally, the Zephyr One left Lake Ontario through the secret underwater access one last time to fly to Chicago, where Talbot had been spotted in his quest for more Gravitonium.

Appearances
In chronological order:
 * Agents of S.H.I.E.L.D.
 * Season Five
 * Rewind
 * All the Comforts of Home
 * The Real Deal
 * Inside Voices
 * Option Two
 * The One Who Will Save Us All
 * The Force of Gravity
 * The End