Chicago Union Station in the context of "West Loop, Chicago"

The Baths of Caracalla (Italian: Terme di Caracalla) in Rome, Italy, were the city's second largest Roman public baths, or thermae, after the Baths of Diocletian. The baths were likely built between AD 212 (or 211) and 216/217, during the reigns of emperors Septimius Severus and Caracalla. They were in operation until the 530s and then fell into disuse and ruin.

Both during and since their operation as baths, they served as inspiration for many other notable buildings, ancient and modern, such as the Baths of Diocletian, the Basilica of Maxentius, the original Pennsylvania Station in New York City, Chicago Union Station and the Senate of Canada Building. Artworks recovered from the ruins include famous sculptures such as the Farnese Bull and the Farnese Hercules.

The Richard B. Ogilvie Transportation Center (/ˈoʊɡəlviː/), on the site of the former Chicago and North Western Terminal, is a commuter rail terminal in downtown Chicago, Illinois, United States. For the last century, this site has served as the primary terminal for the Chicago and North Western Railway and its successors Union Pacific and Metra. Intercity services had disappeared by the 1970s, but commuter services on the three ex-CNW mainlines, Metra's UP District lines, continue to terminate here. The tracks are elevated above street level. The old CNW terminal building was replaced in the mid-1980s with a modern skyscraper, the 500 West Madison Street building. The modern building occupies two square city blocks, bounded by Randolph Street and Madison Street to the north and south and by Canal Street and Clinton Street to the east and west. It is the second busiest rail station in Chicago, after nearby Union Station, the sixth-busiest railway station in North America, and the third-busiest station (after Grand Central Terminal and Jamaica station in New York City) that exclusively serves commuter traffic.

A rail yard, railway yard, railroad yard (US) or simply yard, is a series of tracks in a rail network for storing, sorting, or loading and unloading rail vehicles and locomotives. Yards have many tracks in parallel for keeping rolling stock or unused locomotives stored off the main line, so that they do not obstruct the flow of traffic. Cars or wagons are moved around by specially designed yard switcher locomotives (US) or shunter locomotives (UK), a type of locomotive. Cars or wagons in a yard may be sorted by numerous categories, including railway company, loaded or unloaded, destination, car type, or whether they need repairs. Yards are normally built where there is a need to store rail vehicles while they are not being loaded or unloaded, or are waiting to be assembled into trains. Large yards may have a tower to control operations.

Many yards are located at strategic points on a main line. Main-line yards are often composed of an up yard and a down yard, linked to the associated direction of travel. There are different types of yards, and different parts within a yard, depending on how they are built.