Also known as the Travellers Tree, this species originated from Madagascar. Well, despite its majestic palm look, it's not part of the palm family but a member of the bird-of-paradise, Strelitziaceae family.
Apparently, rainwater collected within the sheath of its stems can be called upon in case of extreme thirst emergencies. The enormous paddle leaves, quite similar to the banana leaves, are borne on long petioles which fan out on a single plane. Its symmetrical crown is very distinctive and absolutely striking.
gently directed away from roof of building
In Malaysia and Singapore, where the outbreak of dengue (a mosquito borne illness) is frequent, the dormant water held by these palms are deemed potential breeding sites. Palm owners are required by local councils to constantly monitor and ensure draining away the excess rainwater. Due to the tedious requirement, it's no surprise that this palm is getting less popular in home gardens.
Lastly, interesting folklore has it that if you stand in front of a Travellers Palm and make a wish in good spirit, it will come true. Will probably give it a try, the next time I encounter one or several???