I went with two friends to the 10th anniversary celebration of the Simeone Museum in Philadelphia today. If you have never been there, you should plan to go. It's a really nice collection of cars, mostly concentrating on competition and sports cars. There are no Lotus on permanent display, but they have (among many others) Ford GT40's, Bugattis, a Porsche 917, the first Shelby Daytona Coupe, and a Corvette Grand Sport. A particularly good plan is to visit when they have one of their regularly-scheduled 'exercise days', when they take some of their rare cars out to a large parking lot, and drive them around. They did that today, with the Daytona Coupe, the Grand Sport, and a Cunningham.
The Simeone is located a short distance from the Philadelphia airport. Here is the website -