Turkey has bars all over Istanbul and the other tourist cities, but there are also cafes and tea shops and that sort of thing that are filled with locals (and some tourists) all evening. In Dubai and Abu Dhabi, the only bars are attached to hotels (and there are a LOT of them), but almost no locals drink, so there are unlimited evening alternatives. Other nearby Muslim countries such as Oman and Bahrain are similar, except with far fewer tourists (and drinkers).
In Rome, the Coliseum and Ancient Rome are outdoors, but the city also doesn’t get as cold as the others so most likely you’ll be fine if you bundle up a bit. In Venice, they often have those floods during December, but they come and go every 6 hours so even if you get unlucky you’ll still be able to get around half the day, and it’s a small city anyway.
Costa Rica is kind of the Thailand of Latin America in that they have great tourist infrastructure and it’s the easiest place to get around. They also have a lot to offer with the beaches on both coasts and many natural sights and activities, plus of course the Arenal volcano, which is a really nice area. San Jose is best as a place to just pass through on your way somewhere else.
You might also consider Malaysia and perhaps a stop in Singapore. Malaysia is actually more modern than Thailand so everything is easy and reliable. They have cheap VIP buses that are very comfortable. Penang in the north is really nice and also interesting. Kuala Lumpur is a modern and pleasant big city. A bit south of that is the colonial town of Malacca, which is also very nice and worth a look. Going south from there you can reach Singapore in a few hours, and that is an amazing city, although accommodation there is expensive.
Italy should be at least a bit warmer than England this time of year, but not by all that much in a typical year. Also, if you only have about 9 days I think I’d try for no more than 3 or perhaps 4 total cities (Venice can be appreciated in about 24 hours if you are in a hurry). And of course, Paris and Amsterdam will both be quite chilly, so I think I’d save those for another trip. My recommendation would be to spend the whole trip in Italy so you aren’t so rushed. Do Rome for at least 3 nights and Florence for 2 or 3 nights, and then Venice for 1 or 2 nights. You could still have time to pop down to Sorrento for a couple nights to see Naples and Pompeii and whatnot.
In Cambodia the best place by far is the Angkor Wat temples just outside of Siem Reap. Siem Reap itself is a nice town with plenty to see and do, but 3 or maybe 4 days should be enough. Otherwise you have Phnom Penh, which isn’t too special, or Sihanoukville, which is a pleasant beach town that doesn’t really match up to most of what you are used to in the Philippines.
Yes, Australia is pretty expensive by most standards, although it shouldn’t seem too bad since you are coming from Singapore. Hotels in Australia are pretty expensive no matter where you go, although quite a bargain compared to the same thing in Singapore. Restaurants in Australia will seem quite expensive compared to the hawker centers, but not bad compared to Singapore’s sit-down restaurants.
Those temples are all outdoor for the most part, so cooler and dryer conditions mean you can spend more time touring the temples and still being comfortable. Almost any other month of the year and you'll be better off going back to your hotel for a few hours in the afternoon, but in December you can carry on all day if you like. The town of Siem Reap is a delight in itself, but of course it fills up near Christmas.
I need some help planning my honeymoon which will be around the last week of November. We plan to spend anywhere from 9-12 days. We aren’t big beach sitters(a day or two by the beach would be enough). I love culture and buildings and my fiance is shopping and nature. I always tend to lean towards going back to Europe but the weather in late decmenber is kind of a detourant. One big issue is my fiance vetos anywhere that is on the CDC’s list of Zika virus areas. We were going to go to Argentina and Chile, but Argentina is now on the list. i’ve considered is still doing Chile(risk is when will it join the rest of south and central america on the zika list), Morocco, and i always think italy is a good option.
December is a popular month to go cruising around Hawaii and Mexico. It’s an ideal family trip, especially with most kids in the US out of school for the holidays. Experience the Hawaii’s tropical paradise. Pick a popular cruise liner and visit ports of call like Nawiliwili on Kauai, Honolulu on Oahu and Kona on the Big Island. If the Caribbean floats your boat, we recommend taking a cruise to explore Mexico’s Costa Maya, Cozumel, Ensenada, Acapulco, Cabo San Lucas, Puerto Vallarta and more.
If you’re a bit more on the timid side, you can always use Yelp and TripAdvisor to get good insights on places people have visited. As a disclaimer, some of the ratings may not be accurate on these sites, so make sure you go through and read some of the more recent reviews that people have written. We did this for a few of the places we visited and had no issues.