Ruins of Panama Viejo
UNESCO World Heritage Site, Panamà Viejo, are the remains of the original city, founded in 1519. It was a flourishing port city on the Panama Bay for over a century, but was attacked numerous times by pirates, withstood a major earthquake, and was ravaged by fires. It was ultimately destroyed by the invasion of Welsh pirate Henry Morgan, and only ruins stand today. It's a beautiful, quiet area to walk around for a couple of hours, and the modern high rises in the background make for an interesting contrast.