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The Kochbrunnen (in German: boil fountain) in Wiesbaden is the most famous hot spring in city. It is a sodium chloride hot spring. Its name refers to the water temperature of about 66 °C. The spring in the Kochbrunnenplatz was first mentioned in 1366 as Bryeborn (Brühborn) and 1536 as Syedenborn (Siedeborn). The productivity is about 360 litres every minute. The fountain has well water when exiting, at a temperature of 66.1 °C, smells faintly of hydrogen sulphide and has a strong salty taste. It is clear, but becomes turbid yellowish after 24 hours exposed to the air. The main flow is directed to the processing plant in the Kaiser-Friedrich-Bad. From there it passes into the extensive thermal water system of the city. It is used both for medicinal purposes (including in the hot springs in Aukammtal), as well as to heat the city hall. Kochbrunnenplatz and neighbouring Kranzplatz host some of the Wiesbaden Grand Hotels: the oldest hotel in Germany, the "Schwarze Bock" founded in 1486; the former "Palace Hotel" – it was the first ever with room phones – and the "Hotel Rose", launched in September 2004 and which now hosts the Hessische Staatskanzlei.

Hessische Staatskanzlei (Hessian State Chancellery) is located in Mitte, Wiesbaden, Hesse, Germany. The former Grand Hotel Rose is the seat of the government of the State of Hesse. The Acting Head of the Hessian State Chancellery has been Axel Wintermeyer since August 31, 2010.

Nassauer Hof is a luxury five-star superior hotel in Wiesbaden, Germany, and member of the international association The Leading Hotels of the World as well as the German association Selektion Deutscher Luxushotels . The property was built in 1813 and is situated across from the Wiesbaden Kurhaus and at the end of Wiesbaden's luxury shopping avenue Wilhelmstrasse.

The Bergkirche (Mountain Church) is one of four main Protestant churches in Wiesbaden, the capital of Hesse, Germany. It was completed in 1879 in Gothic Revival based on a design by Johannes Otzen. The church is focused on having the altar and pulpit close to the congregation, following Luther's concept of a universal priesthood. It also serves as a concert venue for church music.

Marktkirche (English: Market Church) is the main Protestant church in Wiesbaden, the state capital of Hesse, Germany. The neo-Gothic church on the central Schlossplatz (English: Palace Square) was designed by Carl Boos and built between 1853 and 1862. At the time it was the largest brick building of the Duchy of Nassau. It is also called Nassauer Landesdom (Cathedral of Nassau).

Wiesbaden City Palace (German: Stadtschloss Wiesbaden or Wiesbadener Stadtschloss) is a neo-classical building in the center of Wiesbaden, Germany. It was completed in 1841 as the principal city residence of the Dukes of Nassau. The palace has several wings, 145 rooms, and is architecturally integrated with a group of ancillary buildings constructed both before and after it was built. With ornate towers, gables and a slate roof laid in herringbone patterns, the three-story complex lends charm and its name to the central square of Wiesbaden: Palace Square (German: Schloßplatz).The Palace has had a turbulent history. After withstanding the Revolutions of 1848 and annexation by Prussia in 1866, it has served variously as a second home of the German Emperors, a gathering place for soldiers and workers during the German Revolution of 1918–1919, a museum, and a military headquarters for both the Wehrmacht and Allied occupation forces. Damaged during World War II, the Palace has since been restored and portions modernized. Since 1946 it has been the seat of the State Parliament of Hesse (German: Hessischer Landtag). A new Parliamentary Chamber was added to the complex in 2008.

The Bowling Green is a park in the Hessian state capital of Wiesbaden. The Bowling Green is of an elongated rectangle with two pools, one of each in the middle of three shells cascading fountain stands. On the east side the park joins the Kurhausplatz in front of the Kurhaus, Wiesbaden. Close behind the Kurhaus with its famous casino, stretches the Kurpark. On the west side of Bowling Green runs the Wilhelmstrasse. Across the street lies the Kaiser-Friedrich-Platz with the statue of Emperor Frederick III. The place is flanked by the luxury Hotel Nassauer Hof. The Bowling Green is often used for open-air events for example held concerts by David Gilmour, Leonard Cohen, R.E.M., Sting, Nelly Furtado, Bryan Adams, Plácido Domingo, Lionel Richie, Eric Clapton, Elton John and Herbert Grönemeyer. In addition, the Bowling Green is a place for special events. Every year in June, occur the Wilhelmstrassen festival, one of the largest street parties in Germany - and every New Year's Eve the largest party in Wiesbaden take place here.

The New Town Hall (German: Neues Rathaus) is a town hall on the Schlossplatz in Wiesbaden, Hesse, Germany. It hosts the city government including the city council, offices of the mayors and part of the administration. It was built between 1884 and 1887 by Georg von Hauberrisser in a Renaissance Revival architecture style. The basement is almost completely occupied by a restaurant called Ratskeller.

The Rheingauer Weinwoche (literally Rheingau Wine Week) in Wiesbaden, commonly known as Weinfest, takes place annually from the second Friday in August for ten consecutive days on the Palace Square, in front of City Hall. The "longest wine bar in the world" is also measured at the 118 stalls (including 98 wine stands) and Marktkirche stages for music. Traditionally, there is only one beer stall, namely the "Ratskeller" in the basement of the City Hall. The Rheingau Wine Festival attracts more than 400,000 visitors annually.

The Schlossplatz (Palace Square or Castle Square) forms the center of the historic Old Town of Wiesbaden, Hesse, Germany. It gets its name from the Stadtschloss, the royal residence of the Dukes of Nassau located on the north side of the square. Other buildings surrounding the Schlossplatz include the Old City Hall, the New Town Hall and the Marktkirche. In the middle of the square stands the Marktbrunnen (Market Well) of 1753. Due to this unique building ensemble, and the fact that at this point medieval Wiesbaden originated, it is historically the most important part of the city. Occasionally it is referred to as the "market square", its name before the palace was built. The Schloßplatz was officially written as a proper noun using the letter 'ß' in the old German orthography. However, it was also correct to spell the word in new orthography as "Schlossplatz", which it often is.

The Landtag of Hesse (German: Hessischer Landtag) is the unicameral parliament of the State of Hesse in the Federal Republic of Germany. It convenes in the Stadtschloss in Wiesbaden. As a legislature it is responsible for passing laws at the state level and enacting the budget. Its most important function is to elect and control the state government. The constitution of the State of Hesse describes the role of the Landtag in sections 75 to 99. The Landtag consists of 137 members of six parties. There is a coalition between the Christian Democratic Union and the Greens. The President of the Landtag is Astrid Wallmann and the Minister-President of Hesse is Boris Rhein.

Wiesbaden (German pronunciation: [ˈviːsˌbaːdn̩] (listen)) is a city in central western Germany and the capital of the state of Hesse. As of June 2020, it had 290,955 inhabitants, plus approximately 21,000 United States citizens (mostly associated with the United States Army). The Wiesbaden urban area is home to approximately 560,000 people. Wiesbaden is the second-largest city in Hesse after Frankfurt am Main. The city, together with nearby Frankfurt am Main, Darmstadt, and Mainz, is part of the Frankfurt Rhine Main Region, a metropolitan area with a combined population of about 5.8 million people. Wiesbaden is one of the oldest spa towns in Europe. Its name translates to "meadow baths", a reference to its famed hot springs. It is also internationally famous for its architecture and climate—it is also called the "Nice of the North" in reference to the city in France. At one time, Wiesbaden had 26 hot springs. As of 2008, fourteen of the springs are still flowing.In 1970, the town hosted the tenth Hessentag Landesfest (English: Hessian Day, a state festival). The city is considered the tenth richest in Germany (2014) boasting 110.3% of the national average gross domestic product in 2017. The average annual buying power per citizen is €24,783.