McKinley Explorer : Award-winning McKinley Explorer® rail service by Holland America. Our fleet of restored Budd railcars have the smoothest ride on these rails. And now we’re introducing four new luxurious railcars. They’re not only the largest passenger railcars in service in North America; they boast more glass area than any other railcars built. Every other car also features a lower lounge, a gift shop and an open-air viewing platform so that nothing gets between you and the bigger-than-life views.