Glass floor

This article is about an architectural feature. For limitations on career advancement, see Glass ceiling. For the 2004 Maritime album, see Glass Floor. For the short story by Stephen King, see The Glass Floor.
Glass floor at Ostankino Tower, Moscow, Russia
Glass in-floor display case showing Roman artifacts in Naples, Italy

Glass floors are made with transparent glass when it is useful to view something from above or below; whereas translucent glass is used when there is no need to view through. In either case, toughened glass is usually chosen, for its durability and resistance to breakage.