1. Cube Houses (Kubuswoningen) in Rotterdam are a unique architectural attraction. Designed by Piet Blom in the late 1970s, these cube-shaped houses are tilted at a 45-degree angle and stand on piers, resembling a village within a city.

Each cube house consists of three floors. The bottom floor is used as the entrance, the second floor as the living area, and the third floor as the sleeping area. Despite the unconventional shape, the houses offer practical and functional spaces inside, with windows on all sides to provide ample natural light.

These cube houses have become an iconic symbol of Rotterdam and are considered an architectural marvel. They are not only a residential area but also host a variety of businesses including shops, offices, and a hostel.

2. The Cube Houses are not open to the public for interior tours as they are primarily residential units. However, visitors can explore the exterior of the houses and experience the unique architectural design. The area surrounding the Cube Houses is open for visitors to walk around and take pictures.

There is no specific entrance fee to visit the Cube Houses, as they are a public architectural attraction. However, there may be a small fee if you choose to visit any businesses within the houses, such as the hostel or shops.

3. The Cube Houses are located in Blaak, a central area in Rotterdam, and are easily accessible by public transportation. The nearest train/metro station is Rotterdam Blaak, which is just a short walk away. There are also various bus and tram stops nearby.

For specific opening hours and any additional information, it is recommended to contact the Rotterdam Tourist Information Center at +31 10 790 0190 or visit their website for updates on visiting the Cube Houses.