Nirvana had just finished a two-week tour of Europe, opening for the underground trailblazers Sonic Youth.

CNN: 'Nevermind,' never again?

Plans include a new song school, alterations to the clergy vestry and opening access to underground vaults.

BBC: Planning permission granted for Bath Abbey renovation

This is a building that has until now been rather more impressive from the outside, but the opening of the underground sections means that visitors will be able to envisage the entertainments held here from a new, if chilling perspective.

BBC: Going underground at the Colosseum

As transport patterns changed over the past century, the underground network waxed and waned, with new stations opening and others closing to match demand.

BBC: Reawakening the Underground

Similar inventiveness distinguishes the "racial harmony" panels: "The Underground Railroad" (white men helping runaway slaves to escape), "Opening Day at Talladega College" (newly freed slaves bartering animals and produce for tuition) and "The Building of Savery Library" (blacks and whites laboring together).

WSJ: Rising Up: Hale Woodruff's Murals From Talladega College | High Museum of Art | From Mutiny to Harmony | By Karen Wilkin

Through sheer force of will, Eisner and his organization have had a profound impact on the lives of L.A.'s disadvantaged, opening what the author Malcolm Gladwell, a champion of Eisner's, has called an "underground railroad" out of the barrio.

WSJ: The Unlikely Reformer | Innovator of the Year 2012 Education