Wallis and Futuna are rather different environments. For starters, Wallis is flat-ish, rising gradually to 145m above sea level, while Futuna is peaky, jutting up to 524m. Wallis has a lagoon and barrier reef, but Futuna has craggy shores and is sans lagoon (to dip into local parlance). But both islands are green, green, green, with more than 3m of annual rainfall dumping on locals' rooftops. Aside from fairly regular tropical cyclone events in summer, Futuna sits near a collision point between underlying tectonic plates and is prone to earthquakes.