One of the fascinating structures of Trier is the Therme, or Roman bath. The ruins are elaborate, with extensive subterranean passageways and outer walls that once contained multiple floors.
Trier was also the birthplace of some prominent individuals, one being Karl Marx. Many do not know that Marx was born to a middle class family, his father being a local government bureaucrat. Moreover, Marx was raised a Christian, and before he left for a university education wrote what some have described as beautiful Christian poetry. A few years of higher education with vehemently skeptical professors led Marx down another path. It is ironic that today, just down the street from his birthplace, is a Mercedes car dealership (the height of capitalism!) and a slew of sex and strip clubs (the result of no moral absolutes). Today, the house is a small museum.
Another structure that is worth seeing is the Palace of Trier, which is a Renaissance-era structure from the 1400s (below). Nearby is a nice garden with statues of influential figures in various aspects of cultural improvement (below right).
Finally, mention must be made of one of the bridges in Trier. The Romanbrucke is close to 1,800 years old. The top of the structure is modern, but the foundation pillars are ancient. This speaks highly of the quality of Roman engineering... and makes one wonder about our engineering today!