Baths of Caracalla in Rome, Italy.

It was built just outside of Rome, by the Appian Way (212–216 AD). The baths were of an unprecedented size, allowing 1600 Romans to bathe simultaneously. In addition to the bathing facilities, there were two libraries, shops, offices, gardens, and even a sports area. Artworks recovered from the ruins include famous sculptures like the Farnese Bull and the Farnese Hercules. During and after their operation as baths, they served as inspiration for many other notable buildings, ancient and modern, like 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. Baths of Caracalla in Rome, Italy is tourist attractions these days.