See inside the luxurious resort GOP members stayed in for their retreat - and where Congress would have escaped to during the Cold War

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The iconic North Entrance of The Greenbrier in White Sulphur Springs, West Virginia.

Every year, Republican members of Congress and their staffers convene for a three-day retreat - away from the hubbub of Washington - to socialize and discuss their party's agenda.

On Wednesday, GOP lawmakers traveled to this year's venue: The Greenbrier, a luxury resort in West Virginia, established during the 18th century, that has hosted US presidents and features an underground bunker where Congress was supposed to hideout in the event of a nuclear outbreak during the Cold War.

Take a look at what it's like inside this beautiful resort: