Photo: xiquinhosilva, CC BY 2.0 via Wikimedia Commons
This is, first of all, a huge park with both green spaces and an enormous open square with an equally-impressive ancient palace gate (the palace is Tang dynasty, built in 634 AD). There's a model of the palace next to the gate. The square sometimes hosts public performances. The park even has an IMAX theatre. The park, gate and square are accessible for free. If you pay for admission, you can actually go into the partially restored palace ruins and other sections of the park protected by a moat. Worth seeing for the sheer size of it - it's more than 4 times the size of the Forbidden City, and a very surreal effect compared to the crowding in the rest of Xian.
The Daming Palace was the imperial palace complex of the Tang dynasty, located in its capital Chang'an. It served as the imperial residence of the Tang emperors for more than 220 years. Today, it is designated as a national heritage site of China, and part of the UNESCO World Heritage Site "Silk Roads: the Routes Network of Chang'an-Tianshan Corridor". The area is located northeast of present-day Xi'an, Shaanxi Province.
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陕西科学技术馆, 陕西科技馆
The museum has four floors. The first floor focuses on the history of human technological development. The second floor is devoted to electromagnetics. The third floor is concerned with optics, mechanics and mathematics. The fourth and uppermost floor has multimedia and electronics exhibitions.
杨虎城将军止园别墅
One of two heritage properties administered by the Xi'an Incident Museum (西安事变纪念馆). the other being General Zhang Xueliang's Official Residence (listed below). Generals Yang Hucheng and Zhang Xueliang were the leading conspirators behind the Xi'an Incident.
陕西美术馆
Not to be confused with the Shaanxi Province Art Museum (listed below). The Shaanxi Art Museum is the smaller of the two museums and mainly displays paintings and calligraphy.
张学良将军公馆
The Xi'an Incident Museum's main exhibition halls are at this site.
Huimin Street (回民街 Huímínjiē)
Walk through the Muslim quarter sampling food and buying souvenirs. The Hui Muslim Quarter (回民街 Huí mín jiē, hwei-min-jyeh) is a series of small alleys located in a high-density Hui community (very much like Chinatown in North America) inside the city walls, where the residences open up small restaurants and food shops like street food. Some of these restaurants are among the most famous ones in the city, regarded as the "true Xi'an cuisine" by the locals. However, visitors from outside the city may dislike the environment while the locals may not, because garbage can be seen almost everywhere on the street. Price is high here (some time more doubled) without matching the quality. It is recommended to try only the Huimin food here while keeping other Xi'an delicacies elsewhere in the city.
钟楼; Zhōnglóu
The traffic island is almost ringed by a subway, enter from north side next to Metro entrance. Great tower with ancient bells to toll the time for the city. Short musical performances every hour or so.