Super wide pine planks. Some times floors like these are actually the original floor boards and another floor was pulled up to reveal the planks.

These floors are 12" Eastern White Pine; the angle of picture does make them look wider.

We had purchased them from a wholesale mill in PA as part of a much larger order. On eastern Long Island, I would recommend Heritage Wide Plank Flooring or HS Woodwrights for a wide range of wide plank flooring options.

Do the floors have a polyurethane coating or is tung oil coated?