Exotic
Part of speech: adjective
Definition: Foreign, with the connotation of excitingly foreign. Non-native to the ecosystem.
Part of speech: noun
Definition: An organism that is exotic to an environment. An exotic dancer; a stripteaser.
Example sentence: There, the grand lines of mountain and sea are admirable, and apart from the exotic vegetation that is here, Monte Carlo is certainly the most beautiful spot of the entire coast: the motifs there are more complete, more picturelike, and consequently easier to execute.
Unusual
Part of speech: adjective
Definition: Unlike what is expected; differing in some way from the norm.
Example sentence: I always like to do something different, something unusual, stray off the path a bit.