The titan plant at the US Botanical Gardens in DC. According to the literature from the USBG, the plant is said to have a strong odor. Unfortunately, or maybe fortunately, the odor dissipated by the time I visited on 7/22/13. The line was long, but moved quickly. It was an awesome experience. I recall having seen a story on the news about this type of plant before, probably 15 years or more ago. I always wanted to see it. It was worth the wait.