[EBH]

there is a charge for walking to the top of the Statue of Liberty,
to drive into many National parks,
to use particular services of the Library of Congress

Potential new fees?

toll roads on interstate highways
medical device use fees http://www.medcitynews.com/2011/06/medical-device-industry-to-fda-no-user-fee-hikes-until-goals-met/
trash removal fees (trash is interstate commerce)
recycling fees
recreation user fees
telecom fees
value capture fees on property
faa user fees
internet usage fee for DHS security monitoring
...

[maine-iac7]

value capture fees on property

What, pray tell, is that?