Sigma 24-105 mm | f/4.0

Insiders call it the "Magic Mountain", the Heinrich-Hildebrand-Hill in Duisburg's Angerpark, on which the artists Heike Mutter and Ulrich Genth have erected a huge construction reminiscent of a roller coaster and called Tiger and Turtle.

Greenish lighting, the name Erin - you might not immediately think of Ireland, but you would be right. At the end of the 19th century Irish mining entrepreneur Mulvany merged several claims in the Castrop area and named the new large claim after the goddess Erin, whose name is a form of the Gaelic Eire: Ireland.

The mines have a long history. Initially used to mine hard coal, the owners changed several times over the course of the following year until it was shut down in 1982 after almost 120 years of mining activity.

The disused coal mine Zeche Zollern in Dortmund is one of the most architecturally remarkable pits in the Ruhr area. The park-like facility with its impressive Art Nouveau buildings still shows today that it was built as a model colliery around 1900 and was intended to show both economic strength and progress.

We visited the facility with our friends from Herne, the photographers Renate and Jürgen Saibic, whom we met many years ago on Easter Island in Chile.

Blue hour over the cathedral island on the Oder in Wroclaw - on the right you can see the two towers of the cathedral.

The "Tartu Tower of Pisa" or simply the "Leaning House" at Rathausplatz 18 was built halfway on the medieval city wall in 1793.

Vilnius is also often referred to as the baroque capital of Lithuania and the many baroque buildings in the old town confirm this.

The sources for the following outline of National Socialism in Lithuania can be found in the incorporated links well and unequivocally documented.

When cruise ships arrive, the flood of tourists rises in Tallinn's beautiful old town and many shops are now booming

It is worth exploring the eventful history of Singapore, which is linked to the names Sang Nila Utama and Thomas Stamford Raffles, among others.

In the blue hour, the orange, yellow and green tones of the harbor lighting come into their own.