"I recommend this Baltimore museum for history lovers who want to ride along the country's first mile of commercial railroad via the seasonal Mile One Express, a round-trip of about 40 minutes, and to see notable rolling stock such as the No. 147 Thatcher Perkins steam locomotive, which was used during the American Civil War to transport Union troops and supplies. The museum offers a tangible connection to early U.S. railroad history through its exhibits and seasonal rides." - Lydia Mansel Lydia Mansel Lydia Mansel is a writer with more than eight years of experience editing and writing for both brands and online publications—with a particular focus on travel, fashion, and lifestyle. She’s also the founder of the travel site justpacked.com. Travel + Leisure Editorial Guidelines