The Auschwitz memorial and museum has been forced to issue a reminder to visitors to not use the train tracks at the site of the Nazi German concentration camp as a "balance beam".

Key points: The Auschwitz museum says visitors "should behave with due solemnity and respect"

The Auschwitz museum says visitors "should behave with due solemnity and respect" Trains were used to transport prisoners to Nazi concentration camps during World War II

Trains were used to transport prisoners to Nazi concentration camps during World War II About 1.1 million people died at the Auschwitz camps during the war

During World War II, trains were often used to transport prisoners to the concentration camp, which has since been turned into a museum and memorial that hosts millions of visitors each year.

But not everyone visiting Auschwitz, where 1.1 million people were killed by Nazis, has been behaving appropriately.

The museum tweeted a series of photographs of people balancing on the rails of the train tracks that lead to the gatehouse — colloquially known as the Gate of Death.

Alongside the pictures was a reminder.

Over a million people were killed in the Auschwitz camps during World War II. ( Twitter: Auschwitz Museum )

"When you come to @AuschwitzMuseum remember you are at the site where over 1 million people were killed. Respect their memory," the tweet read.

"There are better places to learn how to walk on a balance beam than the site which symbolises deportation of hundreds of thousands to their deaths."

The museum said of those photographed walking along the tracks, "what those people did was not respectful", and flagged its guidelines for visitors.

"Visitors to the grounds of the Museum should behave with due solemnity and respect," the guidelines read.

The rules and regulations for people attending the museum go on to say that "guards have the right to intervene and request persons who violate these regulations to leave the museum".

The museum asks people to regard the memorial with appropriate solemnity. ( Twitter: Auschwitz Museum )

The post by the museum echoed similar outrage over images of people posing at the Memorial to the Murdered Jews of Europe, in Berlin.

A 1.9-hectare space featuring 2,711 concrete slabs, it has become a popular tourist destination.

Not everyone who attends appears to grasp the gravity of the memorial, with social media streams featuring everything from people taking smiley selfies to clearly inflammatory captions on posts (one said "Jumping on dead Jews @ Holocaust Memorial").

Jewish artist Shahak Shapira photoshopped the real horrors of the Holocaust into the background of tourists' snaps at the memorial in a project he called Yolocaust.