Centennial, CO, United States

With a population of 108,418, Centennial is the 11th largest city in Colorado, but don't be fooled - this sprawling suburban enclave is no paradise. The city's irregular boundaries read like a gerrymandered mess, and the tax burden has ballooned well beyond the 1% promised to residents during incorporation. Meanwhile, coyote sightings are on the rise, a persistent headache for pet owners. For those seeking a sterile, corporate-friendly environment west of Denver, Centennial may fit the bill, but most will find the tradeoffs outweigh the benefits.