Temple of the Emerald Buddha (Wat Phra Kaew), Bangkok

Even as local, I still can't get enough of this temple. It's elegant craft and detail worked that's go into building this temple is absolutely astounding. It can get very how during the day (especially during the Summer) best time to visit is very early in the morning when the temple just open. It's also good to try to avoid the crowds. Make sure to take the time to enjoy the wall painting along the temple.

Not to be missed when visiting Bangkok. The ticket includes entry to this temple and the Grand Palace (actually this temple is part of the Grand Palace). It includes also a traditional dance show at a nearby theater. It is worth watching it and there are free shuttles just outside the temple. Following Lonely Planet's advice I looked for a guide inside. There were no guides, except for a free tour run by the administration that I believe runs 4 times a day (10, 10:30, and another 2 in the afternoon). Unfortunately, I had hard time understanding the guide (the mask certainly didn't help), so I quit the free tour and followed the free brochure (they have them in several languages) and I was just fine going with that. Most of the people were with guides hired outside the temple and they seemed to do well. It gets quite warm during the day, so my advice is to be there early. There is a lot to see, plan for at least 3-4 hours (combined with the Grand Palace). One more thing, you can't take photos or videos inside the temple.