Devil's Throat (Garganta del Diablo), the most iconic section of Iguazu Falls on the Argentine side, is highly accessible via an ecological train and well-maintained catwalks within Iguazu National Park; while the main viewing platform can be very crowded, parts of the park offer wheelchair accessibility. It can be easily explored independently, though guided tours provide deeper insights into the park's ecology. Open year-round, visitors should note that extreme water levels during rainy seasons might lead to temporary closures of the catwalk for safety. The primary cost is the Iguazu National Park entrance fee (approximately $20-30 USD for foreigners), with optional boat excursions costing extra. Allow 1-2 hours specifically for Devil's Throat, but a full day (6-8 hours) is recommended to explore the entire Argentine side of the falls. Useful tips include wearing comfortable shoes, bringing rain gear (expect to get wet!), sunscreen, and insect repellent, and arriving early to mitigate crowds at this breathtaking natural wonder.