The Archenhold Observatory is home to the longest moving refracting telescope in the world. Measuring 21 meters in length with a lens diameter of 68 centimeters, this impressive instrument showcases the scale and ambition of late 19th-century astronomy.
Built in 1896 by Dr. Friedrich Simon Archenhold, the giant telescope became a landmark of scientific progress. Today, it belongs to the Deutsches Technikmuseum Berlin, where its engineering and historical value are preserved and shared with visitors.
In 1915, the observatory gained a special place in scientific history when Albert Einstein presented his Theory of Relativity to the public there. The event connected the site not only with astronomical observation but also with one of the most important shifts in modern physics.
Source - https://en.wikipedia.org/wiki/Archenhold_Observatory
From 1941, 12,000 tons of concrete in a 15-m-high and 20-m-diameter cylinder were built to test the load-bearing capacity of the Berlin soils (turns out glacial sands are no good basis for gargantuan architecture) for Albert Speer's Germania buildings. Too massive for later blasting, this is one of the more bizarre remains of the Third Reich.
Berlin's biggest lake and popular resort for bathing and watersports. You can also travel there by tram, which is an experience by itself.
Places with markets on Wednesdays and Saturdays are popular with locals at Winterfeldplatz. Buy a coffee and browse amongst the stalls; this is a place to unearth hidden gems. Breakfast is served usually until 14:00-15:00.
This castle is one of Berlin's oldest castles and where Prince Carl used to reside. Be sure to check out Glienicke Bridge, the bridge that became renowned for the exchange of Western and Eastern secret agents. You can also visit Glienicke Park.
The main street of former East Berlin. It is a big avenue, featuring neoclassical East German buildings, fountains and lakes.
Millions of visitors leaving East Berlin by train said tearful goodbyes to their friends and relatives from the East at this former border checkpoint. Hardly a year after the wall came down, the building was turned into a nightclub until it was forced to close in 2006. It re-opened as a museum in September 2011 and now houses a permanent exhibition that brings the absurd normality of everyday life in the divided city back to life.
The Bendlerblock building complex has long held ties to the German military, first serving as the offices of the Imperial German Navy and today housing the Berlin offices of the Ministry of Defense. It was here where, on 20 July 1944, Colonel Claus von Stauffenberg and other officers led a coup that sought to remove Hitler and the Nazis from power. They failed and were summarily executed in the courtyard, where a memorial stands for these men who are considered German heroes by many. Inside the building you'll find the German Resistance Memorial Center, a permanent exhibit dedicated to the July 20 plot and other individuals in the German resistance.
This outdoor and indoor history museum documents the terror applied by the Nazi regime. It is on the site of buildings which during the Nazi regime from 1933 to 1945 were the headquarters of the Gestapo and the SS, the principal instruments of repression during the Nazi era.
The charming Baroque water palace of the Hohenzollern electors surrounded by the Dahme river and an English garden.
This imposing building houses the Federal German Parliament or "Bundestag" and was completed in 1894 to meet the need of the newly-unified German Empire of the Kaisers for a larger parliamentary building. The Reichstag was intended to resemble a Renaissance palace, and its architect, Paul Wallot, dedicated the building to the German people. The massive inscription in front still reads: "Dem Deutschen Volke" - 'For the German people'. The Nazi leader Adolf Hitler exploited the fire which gutted the Reichstag building in 1933 by blaming the Communists for the arson and for attempted revolution. There is good evidence to suggest, however, that his followers were actually responsible and that this was a manufactured crisis. The iconic photo symbolizing the Soviet victory over Nazi Germany shows a Soviet soldier planting the Soviet flag on top of the building and there are to this day graffiti left by Soviet soldiers on some walls of the Reichstag which were deliberately preserved by the new Germany as a memento of the war. It's perhaps the only national parliament to have traces left by a foreign army deliberately preserved. When German reunification became a reality, the new republic was proclaimed here at midnight on 2 October 1990. The Reichstag building is well-known in the art world thanks to Paris-based Bulgarian artist Christo's mammoth 'Wrapped Reichstag' project in 1995. The entire building was swathed in silver cloth for two weeks that summer.The Reichstag has undergone considerable restoration and alteration, including the addition of a spectacular glass dome designed by the British architect Norman Foster completed in 1999. You can visit the Reichstag building proper and even listen to a parliamentary debate but you need to book on their website sometimes weeks or even months in advance. Fortunately its much easier to visit the glass dome. You can reserve a visiting time and date on their website or in the small building across Scheidmannstrasse, except during the high season you should be able to arrange a time later the same day or the next day. Photo ID or passport is required to make the booking. A passsport is required during your visit. This is a very popular tourist attraction in Berlin and can get quite crowded however it is worth the effort. The helical path up the inside of the dome is a lot of fun and the 360 degree views at the top are splendid.
The district town hall was the main town hall for West Berlin during the Cold War. The freedom bell (a present from the American people) and several memorials from that time can be found here. On the main balcony in 1963 U.S. President John F. Kennedy made his famous statement, "All free men, wherever they may live, are citizens of Berlin, and, therefore, as a free man, I take pride in the words ‘Ich bin ein Berliner!’". On 10 November 1989 Helmut Kohl (chancellor (Bundeskanzler) 1982-1998) and Willy Brandt (former Bundeskanzler and mayor of Berlin) cheering the crowd as they saw the end of the Berlin Wall the night before. The town hall is an emotional place for most people in Berlin (especially West Berlin).
Small terrace on the top of the Park Inn, publicly accessible. Take the elevator to the 40th floor, and follow the signs up the stairs. Pay the attendant who also serves beer and coffee. Great views of the Fernsehturm. In the summer, consider base jumping off the roof with Jochen Schweizer. It is often closed in bad/windy weather, so look for a notice posted near the elevator that the terrace is closed.