What other places can you travel besides the 50 states without a visa if you are an american citizen?

I was just curious. What other places can you travel besides the 50 states without a visa if you are an american citizen?
I guess I should have said passport? Without a passport.

What is the average travel and vacation expense for an American family per year?

How much does an average American family spend on travel and vacation in the span of one year?
Including things like, visiting family, vacations, travel expenses, air fare, food, touring, and lodging?
Listing the average expense for your family would be appreciated too.

Can you offer travel tips to an American couple traveling to Egypt?

Like best dining, dress code, customs, safety, best time to travel. My parents are thinking of going and would like to start planning their trip.

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American Tourister Travel Umbrella,Black,One Size

Is travel in Ecuador more dangerous for gringoes than other latin american countries?

I read some in a travel book and the warnings were so scary concerning assaults, weapons and kidnapping. I am now a little shy of travelling there and yet would like to go if it is safer than what I read. Anyone help?