The boiler is slanted at the start but gets level as it climbs the mountain. Ride on the world's first mountain-climbing Cog Railway train, you're in for a treat. Your train will carry you above the clouds to the top of the highest peak in the Northeast, where all of New England spreads out before you. Cog Railway, Mount Washington, New Hampshire, USA The first time was in July and hot so we had light clothes on, when we got to the top we were freezing and there was snow on the ground.