There's a titan arum - a corpse flower - blooming at the Eden Project in Cornwall. For years, it stores energy: and then for 48 hours, it heats up and sends out the smell of decay and death through the rainforest. And it stinks.
The Eden Project: http://www.edenproject.com/
or on YouTube at: https://youtube.com/EdenProjectTV
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(Full disclosure: the Eden Project covered expenses for my trip to visit them, but had no editorial control or sign-off on the video!)