Germany's new tallest escalators are orange - three guesses whose building they're in.

We recently came across the announcement from ThyssenKrupp Fahrtreppen that they've has just completed installation of the "two tallest freestanding escalators in Germany", with a total rise in excess of 23 meters. Guess who the architect is (hint: the escalators are bright orange) and read more about the remarkable Zeche Zollverein complex in Essen, Germany here.