Miniatur Wunderland is a museum with miniaturized, extremely highly detailed models of several popular locations, attractions, cities and countries from all over the world (e.g. Hamburg, Las Vegas, Grand Canyon, Austria, Switzerland, Scandinavia to name a few).
Visitors will find all kinds of model trains, airplanes and cars driving (and flying) automatically through the exhibitions, there are tens of thousands of tiny people figures all over in stadiums, festivals, parks, restaurants etc.
There are several points of interaction through labelled buttons, which can be pressed by visitors to cause lights in the models to flicker, open models, play sounds etc.
At the end there is a gift shop with all different kinds of models, lights, plushies and toys to purchase as well as a restaurant.
Though the museum is usually very full with visitors, it's not super loud most of the time (apart from the occasional child crying), as most people are quietly chatting and it blends together into a white noise.
There are all different kinds of whirring and clicking sounds from the model trains and cars, which are a little bit quieter than a normal conversation between two people (depends on the model/exhibition though, for example the airport is very loud). Occasionally there can be a sound played from a model (sometimes surprising, sometimes through the press of a button) like music from an orchestra or a siren, which can be louder.
Throughout the exhibitions there are faint odors of crafting materials such as wood, plastic, paint, as the museum has the workshop on the same floor, where they craft the models.
In the restaurant there is a general mix of food smells, such as grilled meat, fried food and different types of sauces, which is about as intense as a standard mall food court.
Since the museum is located very centrally, it is easily accessible by public transportation or car (directions at https://www.miniatur-wunderland.com/visiting/at-the-wunderland/directions/).
There are parking spots reserved for disabled visitors right in front of the museum and the entire museum is also accessible via elevator and wheelchair lift (detailed instructions at https://www.miniatur-wunderland.com/visiting/at-the-wunderland/service), plus the museum offers guided tours for Blind and Deaf people on request.
The entry tickets can be bought online (https://www.miniatur-wunderland.com) under the header "Plan your Visit - Tickets", which is where you choose the date and time slot of your visit, group size etc. You can also buy the tickets on location, but you might have to wait until there is enough space for new visitors.
Once you have your ticket, you just show it to the person at the entrance and can go in. You also have to show your ticket when you leave the museum.
In general it is advised to visit the website (https://www.miniatur-wunderland.com/) in case you have more questions, special needs or requests, as most topics are covered in more unambiguous detail there.
Temperature: Throughout the exhibitions the air temperature might vary from slightly warm to colder, depending on the exhibit (Italy is warmer, Scandinavia is colder etc.)
There are toilets labelled for men and women on all floors, plus extra toilets for disabled visitors.