Thousands of feet tread daily over the land where spectators once gathered from all over the vast Roman Empire ... 2019's "European Capital of Culture" and Bulgaria's second largest city, Plovdiv ...

LOM, BULGARIA—According to a Bulgarian National Radio report, traces of a Roman military site dated to the first century A.D. were unearthed at the site of ancient Almus in northwestern Bulgaria.

This mountain city in Bulgaria is known as the Machu Picchu of Europe but is less crowded and easier to get to, while still full of ancient mysteries.