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: