Singapore
Unfortunately, due to my poor planning, I only had about 24 hours to spend in Singapore. All 24 hours were spent based on recommendations from some random guy on my flight in. That flight itself kinda traumatized me since I maybe accidentally/not accidentally smuggled in a pocket knife and gum (which I'm not sure if it's legal) into the country without declaring anything. I did not get arrested or detained so I'm assuming people don't care about pocket knives but I highly suggest not doing that. It'll become a common theme in my traveling that I do the most stupid stuff in other countries.
I stayed at the Crowne Plaza by the airport and arrived at dinnertime. I unpacked my stuff and wandered around the hotel to see the nearby sites and accidentally stumbled upon the Jewel (in the left picture below). Between the hotel and the Jewel, I didn't step outside until noon when I showed up at the Marina Bay Sands. My entire day was spent at the top of the Marina Bay Sands, Gardens by the Bay, and the ArtScience Museum. The highlight of my day was losing the $90 picture that I bought at the top of the hotel. I was also able to spontaneously hang out with my friend, Ben Wong, who is from Singapore and I had the pleasure of showing the Jewel to.
It's definitely possible to see all the conventional tourist sites as quickly as I did but DEFINITELY not recommended. From what Ben told me, there is so so much to see apart from just those places that are just as beautiful and way more cost effective. It is definitely in my plans to go back to Singapore next time I'm in Asia because 24 hours is just not enough for that entire city.