You can go to Travelex or other similar Foreign exchange currency services bureaus inside the international airports and tourist locations.
http://www.travelex.com/us/locations/
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Most banks in the state of Connecticut will exchange US dollars for euros. Some banks do not keep euros on hand but can obtain them, for exchange, within one day.
According to the exchange rates for July 28, 2009: 85.00 Euros = 120.39 US Dollars
The bank or the nearest airport.
According to the exchange rates for December 1, 2009:500.00 US dollars (USD) = 331.61 Euros (EUR)
100 Euros = 132.07 U.S. dollars as at 29th Jan 2012 (exchange rates change daily)