Amtrak's famous "Sightseer Lounge" observation cars are primarily found on its long-distance Western routes that utilize bi-level Superliner equipment. These cars feature floor-to-ceiling windows and outward-facing seats, offering the best views in North America. The specific trains that currently feature these cars in 2026 include the California Zephyr (Chicago to San Francisco), the Empire Builder (Chicago to Seattle/Portland), the Southwest Chief (Chicago to Los Angeles), the Coast Starlight (Seattle to Los Angeles), and the Texas Eagle (on the portion between San Antonio and Los Angeles). On the East Coast, the options are more limited as most trains use single-level "Viewliner" cars that fit through the shorter tunnels of the Northeast Corridor. However, the Cardinal (New York to Chicago) often features a "Great Dome" car or similar windows on specific seasonal runs, and the Auto Train (Virginia to Florida) includes lounge facilities for passengers. In 2026, Amtrak is in the process of rolling out new "Airo" trainsets for regional routes like the Cascades, which feature "panoramic windows" that mimic the observation experience, though the classic bi-level Sightseer Lounge remains the "gold standard" for scenic rail travel.