IGUAZU FALLS, BRAZIL The largest waterfall system in the world should be on everyone's bucket list. The falls may not be particularly high, but with 275 cascades that form a horseshoe and stretch for 8858 feet, they're seriously impressive.
Jewel Box, Lake Powell, Utah. Lake Powell is a reservoir on the Colorado River, straddling the border between Utah and Arizona (most of it, along with Rainbow Bridge, is in Utah). Exploring the area is great travel fun!