Underwood Welcome Center / Rest Area — I-80, Mile Marker 19

The Underwood Welcome Center (eastbound) and Rest Area (westbound) sit at I-80 Mile Marker 19 near Underwood, Iowa, just east of the Nebraska border. Overnight stays are permitted with a posted 24-hour maximum; the facility draws a steady mix of RVs, vans, and semi-trucks throughout the night. Amenities include 24-hour restrooms, free potable water (indoor fountain and an outdoor spigot), free Wi-Fi, vending machines, picnic tables, shaded walking paths, and a dedicated pet area. Expect consistent road noise and bright lot lighting through the night.