February 10, 2017: Travel is never easy — you don’t need to meet up with pests — specifically rats and cockroaches. Top US cities to encounter these creatures include: New Orleans, Houston, Philadelphia and Boston. Bug leaders in California: Los Angeles-Long Beach, Riverside-San Bernardino, and San Francisco — the most popular (and once again) most expensive travel destination in the US. Pay attention to where you walk, eat — and sleep!!!