Historical Archive

A curated record of declassified, decommissioned, and verified legacy underground facilities.

Historical Archive

A curated record of declassified, decommissioned, and verified legacy underground facilities — sourced exclusively from public records, government releases, and credible reporting.

Featured Entry
CONFIRMEDProject Greek Island
White Sulphur Springs, WV, USA

The Greenbrier Bunker

Official Designation

Project Greek Island

Era of Operation

1958–1992

Original Purpose

Continuity of Government — Congressional relocation facility

Current Status

Decommissioned — open as public museum

Why This Entry Anchors the Archive

This entry anchors the archive because it is the most thoroughly documented example of a confirmed COG facility in the public record. The exposure by journalist Ted Gup in The Washington Post on May 31, 1992 provided unprecedented documentation of this previously secret government program.

Technical Specifications

Facility Size

112,000 sq ft

Depth

720 ft below surface

Blast Doors

25-ton blast doors

GPS Coordinates

37.7849° N, 80.3098° W

Construction Cost

$14 million (1958 dollars)

Estimated cost to taxpayers

Primary Evidence Source

The Washington Post, Ted Gup

May 31, 1992

Evidence Confidence Grades

Editorial methodology for evaluating facility records

Confirmed

Verified by official government documentation or declassified records.

Corroborated

Supported by multiple credible independent sources but lacks official confirmation.

Unverified

Single credible source, not yet corroborated.

Disputed

Contradicted by credible counter-evidence.

Debunked

Demonstrably false — evidence actively contradicts the claim.

Archive Facilities

Browse and filter documented underground facilities

9 facilities displayed

CONFIRMEDUK

Burlington (Site 3)

Corsham, Wiltshire, England
1955–1991
UK Government continuity — civilian and military leadership relocation
Status: Decommissioned
35 acres underground, capacity 4,000 people
Source: UK National Archives
CONFIRMEDRussia

Object 825 GTS

Balaklava, Crimea

Territory disputed — administered by Russia since 2014, claimed by Ukraine

1961–1993
Soviet nuclear submarine base and repair facility
Status: Decommissioned — museum
Source: Russian Ministry of Defense / Museum Records
CONFIRMEDUSA

Cheyenne Mountain Complex

Colorado Springs, CO, USA
1966–present
NORAD command center — nuclear attack warning and air defense
Status: Active (alternate command center)
2,000ft below granite, 15 freestanding buildings
38.7442° N, 104.8561° W
Source: USAF / NORAD official fact sheets
CONFIRMEDUSA

Mount Weather Emergency Operations Center

Bluemont, VA, USA
1959–present
Primary FEMA continuity of government — Executive Branch relocation
Status: Active
39.0626° N, 77.8869° W
Source: FEMA / Federation of American Scientists
CONFIRMEDUK

Kelvedon Hatch Secret Nuclear Bunker

Brentwood, Essex, England
1952–1992
Regional government nuclear bunker
Status: Decommissioned — public museum
Source: Museum Records / BBC Archives
CONFIRMEDCanada

Diefenbunker

Carp, Ontario, Canada
1959–1994
Canada's Central Emergency Government Headquarters
Status: Decommissioned — national historic site
Source: Parks Canada / Canadian National Historic Sites
CONFIRMEDGreenland

Project Iceworm / Camp Century

Northwestern Greenland
1959–1967
US Army covert nuclear missile silo network concealed within a research station
Status: Abandoned
Source: Declassified US Army film / Danish Ministry of Foreign Affairs
CORROBORATEDRussia

Metro-2 (D-6)

Moscow, Russia
Alleged 1950s–present
Alleged secret government metro system parallel to public Moscow Metro
Status: Alleged active — unconfirmed
Source: Jane's Intelligence Review (1992) — Under Verification
DEBUNKEDUSA

Denver International Airport Tunnels

Denver, CO, USA
1995–present
Purpose: Baggage handling (confirmed). Secret underground base (debunked).
Status: Active logistics tunnels
39.8561° N, 104.6737° W

This entry is an educational record of how unverified claims spread. The tunnels are real and documented. The secret base claims are not supported by credible evidence.

Source: City of Denver / DIA public records

When the Secrets Came Out

Key moments in the declassification of underground facilities

1974

Church Committee hearings expose COG programs

1992

Washington Post exposes Project Greek Island / The Greenbrier

1994

Kelvedon Hatch opens as public museum

1997

UK government acknowledges Burlington (Site 3)

2004

Diefenbunker designated national historic site

2012

FOIA releases confirm Mount Weather operations

Sourcing and Methodology

All entries are sourced from public records, declassified government documents, and credible journalism.

No classified information is accepted or published on this site.

To request a correction or redaction, contact us via the Contact page.