The Sunset Tunnel is a tunnel in San Francisco, California

San Francisco, California

San Francisco , officially the City and County of San Francisco, is the financial, cultural, and transportation center of the San Francisco Bay Area, a region of 7.15 million people which includes San Jose and Oakland...

, used by the N Judah

N Judah

The N Judah is a Muni Metro line in San Francisco, California, so called as it runs along Judah Street for much of its length, named after railroad engineer Theodore Judah. It links downtown San Francisco to the Cole Valley and Sunset neighborhoods. It is the busiest line in the Muni Metro system...

 Muni Metro

Muni Metro

Muni Metro is a light rail system serving San Francisco, California, operated by the San Francisco Municipal Railway , a division of the San Francisco Municipal Transportation Agency...

 line. It opened on 21 October 1928 in a ceremony presided over by Mayor James Rolph

James Rolph

James “Sunny Jim” Rolph, Jr. was an American politician and a member of the Republican Party. He was elected to a single term as the 27th governor of California from January 6, 1931 until his death on June 2, 1934 at the height of the Great Depression...

, and lies directly beneath Buena Vista Park

Buena Vista Park

Buena Vista Park is a park in the Haight-Ashbury and Buena Vista Heights neighborhoods of San Francisco, California, United States. It is the oldest official park in San Francisco, established in 1867 as Hill Park and renamed Buena Vista in 1894. It is bounded by Haight Street to the north, and...

 and the steep hill that the park is located on. The western entrance to the tunnel is located near the intersection of Carl and Cole Streets in Cole Valley. The eastern entrance is at Duboce and Noe Streets, in the Duboce Triangle

Duboce Triangle, San Francisco, California

The Duboce Triangle neighborhood is located near the center of San Francisco, just below the hilly slopes of Buena Vista between the neighborhoods of the Castro/Eureka Valley, the Mission District, and the Lower Haight....

 neighborhood adjacent to Duboce Park

Duboce Park

Duboce Park is a small urban park located between the Duboce Triangle and Lower Haight neighborhoods of San Francisco, California. The park is less than one block wide from north to south, and two blocks wide from west to east...

.

Access to the tunnel is restricted to San Francisco Municipal Railway

San Francisco Municipal Railway

The San Francisco Municipal Railway is the public transit system for the city and county of San Francisco, California. In 2006, it served with an operating budget of about $700 million...

 light rail

Light rail

Light rail or light rail transit is a form of urban rail public transportation that generally has a lower capacity and lower speed than heavy rail and metro systems, but higher capacity and higher speed than traditional street-running tram systems...

 trains only. Despite the limitations of entering the tunnel, this tunnel is not well protected, and is constantly vandalized

Vandalism

Vandalism is the behaviour attributed originally to the Vandals, by the Romans, in respect of culture: ruthless destruction or spoiling of anything beautiful or venerable...

and graffiti-strewn. The length of the tunnel from portal to portal is 4120 ft.