Showcasing almost 40 optical illusions and holograms, the museum teases the brains of visitors and challenges their way of perception.

"The museum is meant to be fun, educational and, most of all, different from other museums where we can observe exhibitions only from afar or in a group," museum boss Urška Humar told the STA.

The museum is full of special rooms, such as the Infinity Disco Room, which plays music, has a disco ball and is filled with mirrors, giving visitors the illusion of infinite space.

A special feature of the Ljubljana Museum of Illusions is its Vortex Tunnel, designed to make visitors feel like they are losing ground and balance even though the room is completely still.

Some classical illusions, like the ones found in psychology textbooks, are also showcased, along with holograms, or "horrorgrams" as they are called, giving the illusion of a real-life werewolf and Count Dracula rising from his coffin.

The museum lets visitors walk freely through the installations and rooms, which have texts in Slovenian, English, German, and Italian.

Visitors are allowed to take pictures and are even encouraged to touch the exhibited works in order to understand what they are about.

The museum is the brainchild of Dejan Grbič, who said that he wanted to bring to Slovenia something new and fresh. After visiting the Museum of Illusions in Croatia's Zagreb, he decided to establish something similar in Ljubljana.

"After visiting the Zagreb museum, I noticed that it sparked much screaming and laughter, that it is fun for both adults and children and that they can also learn something from it," he said.

After going through all the museum's installations, visitors can go into the Smart Playroom, filled with brainteasing games and puzzles, which can also be bought at the museum's Smart Shop.

The museum will be open to visitors every day between 9 AM and 10 PM.