I note another reader is irked by the cost of a Coke from the vans, but the real trap is to overlook the delightful small museum in the grounds of Villa Borghese. If you like art even a teeny bit, it is a tragedy to go to Rome and miss the Galleria Borghese. I know this section is about tourist traps but sometimes the trap is to overlook a gem.
The Galleria Borghese within the Villa Borghese grounds is one of the world's finest experiences. A booking is needed as it is divided into sessions and numbers are limited. The Galleria is exquisitely decorated and the magnificent art works are an epiphany of splendor. It was the most gorgeous museum I have ever seen. It is one of the world's great small museums. I rather liked the Courtauld Museum in London at Somerset House, but this is much better again.
Unique Suggestions: Tickets are collected 30 mins before your session (via the basement ticket office, cafe and bookshop) and you need to check your cameras etc in to the cloak room. I suggest you get there 60 minutes before rather than 30 if you can, to avoid queues and have a coffee or snack at the cafe, or a little walk in the lovely grounds.
Make sure you get an audio guide.
Fun Alternatives: If you think it's too much trouble to make a booking, you probably wouldn't appreciate it enough to be worth your while
I don't like to badmouth hard-working people who need to make a living - however, I am prompted to make note of the many overpriced cart concessionairs in Villa Borghese - without exception (and please correct me if you have found any kindness), I consistently see them surley and always charging higher than necessary prices. Hold hope it will change.
9/10/06 - I just received a comment from a VT Rome tourist who attempted to buy a soda - asked the price and was told 6 € for a small coke - then, got a nasty attitude when he put it back and did not complete the purchase.
Fun Alternatives: Buy those snacks you like before entering the park.