Small-Group San Isidro and Tigre Delta Tour. Combine a visit to historic San Isidro with a tour of the idyllic Tigre Delta on a 5.5-hour small-group tour from Buenos Aires, including hotel transfers. Admire the unique architecture of San Isidro, and set out on a sightseeing cruise around the Tigre Delta, one of the largest natural deltas in the world. Spend time exploring the lively market town of Tigre, with snacks and refreshments included along the way. Book with us and Save 10%! Small-Group San Isidro and Tigre Delta Tour.