Pictures can't do justice to Iguazu Falls -- you have to visit to fully experience the sound, the mist, the utter immensity of these waterfalls. After my visit in March of this year, I am in agreement with most visitors who deem the Brazilian side as the better to view the extent of the waterfalls, and the Argentine side as the better to get up close to the falls. Iguazú National Park in Argentina offers many opportunities to approach the cascades -- whether by trail or by boat. For sheer power, the Devil's Throat waterfalls at the south end of the park should not be missed. From the viewing platforms along the boardwalk visitors can peer right over the edge into the misty abyss separating Argentina and Brazil. Other trails in the middle of the park allow visitors to view waterfalls from above and below, as well as the opportunity to see wildlife such as the ubiquitous coati (do not feed!). The park also offers a boat tour under the falls, which I thoroughly enjoyed; be prepared to get soaked. Iguazu Falls is an incredible natural wonder, and a memorable World Heritage Site (or two -- ask UNESCO why; it makes no sense to me).

Logistics: Iguazú National Park can be reached by frequent buses or by private car from the town of Puerto Iguazú. Even with the border crossing, both sides of the falls can be seen in one day, but it is far better to schedule two days to fully appreciate the falls from Argentina and Brazil.