The second tallest (or maybe the first tallest) waterfall: Tugela Falls
The claim to tallest waterfall is one rife with controversy thanks to some questionable measurements, and Tugela Falls in South Africa is in the running for the title.
Not only is Angel Falls likely shorter than initially measured in 1949, but Tugela Falls is likely taller than its measurements indicate. So rather than 3,110 feet as usually stated (which makes it a bit shorter than the possibly erroneously stated 3,212 feet of Angel Falls) Tugela Falls may more likely be somewhere between 3,255 feet and 3,320 feet in height.
If the two waterfalls are remeasured with more accuracy, we just may see the title for world's tallest waterfall change hands.