There are many gardens in Teplice - and I think this garden is the most beautiful one. It is located between the Beethoven spa centre and the Kurhaus/Lecebny ustav. This is where most people enjoy their walks, just sit and watch or read or whatever they do. At the back of Kurhaus/Lecebny ustav a flight of stairs leads up to the Letna hill with nice views of the city and the mountains.
I recommend that you add a walk from the Zamecke namesti along the gardens eastwards, along the foot of the Letna hill. When entering the district Sanov (the correct name of the town is Teplice-Sanov) you'll see this very beautiful building called Steinbad in German (Kemenne lazne in Czech). It is a spa hotel/sanatorium, built in 1911 and an excellent example for the typical Neo-Baroque and Art Nouveau architecture of that time.
The so called "Urquelle", where the thermal water springs - it is actually brought up by a pumping station - is located only a few steps from Zamecke namesti, next to the Deanery church. The thermal water comes out with a temperature of 42 Celsius. It is used in a couple of spa centres.
There are such column in almost any Czech town to find ... but this one is especially beautiful. It is a work of famous Baroque sculptor M. B. Braun from 1718 - 19 and one of his best ones!
The church was erected to commemorate a Black Death epidemic which spared Teplice and its people.
This church is located at the eastern end of the beautiful square called Zamecke namesti. It was built in the 12th century, the tower was added 1594. In the years 1700 - 1703 the entire church was reconstructed in Baroque style.
Well worth to see is the rich interior in Baroque and Rococo style. It is typical catholic :-) Unfortunately you cannot get in and walk around, only a look through the open door is allowed.
Attached to the castle you see the castle church. It was built 1568 in late Gothic style and restored in Neo-Gothic style 1798 - 1806. Nowadays it is home of the orthodox community in Teplice.
Although you cannot go inside you can have a look through the open main door at the western facade. As you can see on my pic #3 it is very bright and quite beautiful.
The remains of the Benedictine abbey church (a Romanesque crypt) are to see in the garden south of the castle church, best option is to join a guided tour in the castle.
The dominating building at the Zamecke namesti in the southern old town is the castle. It was built 1585 - 1635 on the ruins of the Benedictine monastery from the 12th century. In 1751 and then again in the early 19th century it was reconstructed, so that it appears as a building of the Empire style nowadays.
The castle is home of the Regional Museum. Opening hours are daily except Monday from 10 - 12 and 13 - 17 h. The exhibitions are well worth to see and contain about 750'000 pieces. These are works of art, books, pieces found at regional archeological sites, zoological collections etc.