For one night each year, the gates of churches and various praying areas are opened in the evening time, and you can then visit places that are not accessible during the year. While you can expect great architecture and interesting insights, a rich cultural programme will also entertain you that night.

The Museum of Communism offers an insightful exploration of life under Communist rule in Czechoslovakia, covering aspects like daily life, politics and history. The exhibition includes mock-ups of a worker's workshop, a school classroom, and an interrogation room, providing an authentic feel of the era. Visitors can also view photographs, films, and sculptures documenting state-sponsored terrorism during this period.

The Old Wastewater Treatment Plant, operational from 1906 to 1967, now showcases the evolution of architecture, technology and water management. It was a key part of Prague's modern sewer system, designed to collect and treat wastewater before discharging it into the Vltava river, significantly improving public health and aiding the city's development. Today, the site, managed by Tovarna z.ú., hosts exhibitions, concerts and themed events, featuring operational steam engines and showcasing the original machinery and craftsmanship. The plant is a National Cultural Monument of the Czech Republic, an anchor point of the European Route of Industrial Heritage, and a UNESCO candidate.

This celebration of the foundation of the independent Czechoslovakian state is a opportunity to visit many sights in the city either free of charge or for advantageous entrance fees, and the firework in the evening is an all time favourite. While a street food festival will introduce tastes from the period of the First Republic, performances take place quite all over the centre, and for people of all ages.