The Tigre delta trip is very a very nice trip. Unfortunately I don't remember the name of the tourguide, but she was excellent.
Meet your guide in central Buenos Aires and travel to Tigre by boat, sailing through Costanera Sur Ecological Reserve with views of Buenos Aires. Wind along the narrow canals of Tigre Delta, passing yacht clubs, uninhabited islands, and stilt houses.
In Tigre, transfer by bus to Puerto de Frutos port. After lunch (own expense), explore the markets, admire the views along Paseo Victoria, or visit a museum (own expense).
Return to Buenos Aires by train.
The tour begins with a morning or afternoon pick-up (depending on your chosen departure time) from your Buenos Aires hotel. Traveling aboard an air-conditioned coach, drive along Rio de la Plata, stopping to visit the historic town of San Isidro.
Continue to Tigre and cruise around Tigre Delta. Admire the lush scenery and natural islands from your boat, and pass beautiful waterfront villas, stilt houses, and colorful floating markets.
Return to Buenos Aires by coach.