From the outside they look like a line of gleaming Airstream trailers, especially the dome car at the rear, whose rounded windows afford passengers traveling first class a glorious 360-degree view.

FORBES: Through the Rockies In Style

Next door, Big Sky offers huge, open boulevards, six and eight car lanes wide, as if the locals race tractor trailers down here in the off-season.

FORBES: Just the ticket

Every few hours we saw either another car or a "road train"-a truck hauling two or three trailers.

FORBES: Where the Outback Meets the Sea

Every few hours we saw either another car or a "road train"--a truck hauling two or three trailers.

FORBES: Where the Outback Meets the Sea