Here is an excerpt. The entire essay along with a brief piece by Mark about how he came to write the essay is available at the website.
And what were we seeking? What do the hundreds of thousands who visit concentration camps every year hope to find amongst the barbed wire, the staggering statistics pasted to barracks walls, the bricks riddled with bullet holes and once saturated with blood? What world are we looking for when we pass under the gateway that tells us, Arbeit Macht Frei, Work Brings Freedom? Do we find the same closeness to history, a sense of our own place in it, that we find wandering the back alleys of Venice, touring the White House, crawling through the ruins of ancient Egypt, or gazing at the art amassed in the Vatican Museums?