As long as my poop.
They are man-made.
Lake Mead is the largest, followed by Lake Powell.
The answer is C. Lake Powell
If you're referring to Lake Powell in Arizona, the rental houseboats are available at the marinas (Wahweap, Bullfrog, Antelope). Houseboats in general are located all over the lake, since you drive them to a location you want to stay.
Lake Powell is approximetly 100 miles long depending on how how you measure it.
Lake Powell has approximately 1,960 miles of shoreline when it is at full capacity.
3,000,000 (3 million) people visit Lake Powell a year.
Lake Powell
Lake Powell
Among others there is Lake Powell, Lake Mead and Lake Havasu.
The two big ones that come to mind are Lake Mead and Lake Powell, but there's also Lake Mohave and Lake Havasu.
The outside shots were actually at Lone Rock Beach Lake Powell, Page Kane County Utah USA