Yes mate, so to be fair I should say that any port town doesn't necessarily give the best impression of any country as a whole. I mean, look at Pompey!
Off the top of my head I've done Colon, Panama, rough asyou like. Punta Arenas, Costa Rica. Ok, need to travel a bit to see anything of note. Santo Thomas, Guatamala, interesting, some big falls nearby. Roatan, Honduras. Great beaches, main town very dangerous, especially at night, but daylight...