✔ 最佳答案
Amtrak can get you there. You would get on the train at Metropark, transfer to a Florida train in Philadelphia and get off at West Palm Beach (which is pretty close to Lake Worth). The trip would take you about 24 hours. You could either reserve coach seats (cheaper), or a private compartment (more expensive, but you're able to lay down at night). The Amtrak Florida trains are quite comfortable, and include a lounge car and a dining car (meals are included if you upgrade to a compartment).
The trip isn't overly scenic, but neither is it unpleasant. The biggest price break on Amtrak is based on when you make your reservation: the further ahead you buy it, the lower the ticket price will be.
For more information:
http://www.amtrak.com