Top 10 Strangest Buildings in the World

1. Krzywy Domek - The Crooked House, Poland

The Krzywy Domek is an irregularly-shaped building in Sopot, Poland. Its name translates into English as the Crooked House. The Krzywy Domek was built in 2004. It is approximately 4,000 square meters in size and is part of the Rezydent shopping center. It was designed by Szotyńscy & Zaleski who were inspired by the fairytale illustrations and drawings of Jan Marcin Szancer and Per Dahlberg. It can be entered from either Monte Cassino or Morska Streets.

2. Dancing Building, Czech Republic

The Dancing House or Fred and Ginger is the nickname given to the Nationale-Nederlanden building in Prague, Czech Republic, at Rašínovo nábřeží (Rašín's riverbank). It was designed by the Croatian-Czech architect Vlado Milunić in co-operation with the renowned Canadian-American architect Frank Gehry on a vacant riverfront plot. The building was designed in 1992 and completed in 1996.

3. La Pedrera, Spain

Casa Milà, better known as La Pedrera, is a building designed by the Catalan architect Antoni Gaudí and built during the years 1906–1912. It is located at 92, Passeig de Gràcia in the Eixample district of Barcelona, Catalonia, Spain. It was a controversial design at the time for the bold forms of the undulating stone facade and wrought iron decoration of the balconies and windows, designed largely by Josep Maria Jujol, who also created some of the plaster ceilings.

4. The Niteroi Contemporary Art Museum, Brazil

The Niterói Contemporary Art Museum is situated in the city of Niterói, Rio de Janeiro, Brazil, and is one of the city’s main landmarks. It was completed in 1996. Designed by Oscar Niemeyer with the assistance of structural engineer Bruno Contarini, who had worked with Niemeyer on earlier projects, the MAC-Niterói is 16 meters high; its cupola has a diameter of 50 metres with three floors. The museum projects itself over Boa Viagem (“Bon Voyage,” “Good Journey”), the 817 square metres (8,790 sq ft) reflecting pool that surrounds the cylindrical base “like a flower,” in the words of Niemeyer.

5. Stone House, Portugal

Constructed between two giant stones and linked with a concrete mix, the house is rumored to be inspired by the popular American Flintstones cartoon.  Although quite unusual, the prehistoric-looking residence does feature some traditional components such as windows, a front door, and even a shingled roof.  As you might expect, the house’s design attracts thousands of tourists each year. [Source]

6. Habitat 67, Montreal, Canada

Habitat 67, or simply Habitat, is a model community and housing complex in Montreal, Canada, designed by Israeli–Canadian architect Moshe Safdie. It was originally conceived as his master's thesis in architecture at McGill University and then built as a pavilion for Expo 67, the World's Fair held from April to October 1967. It is located at 2600 Avenue Pierre-Dupuy on the Marc-Drouin Quay next to the Saint Lawrence River. Habitat 67 is widely considered an architectural landmark and one of the most recognizable and significant buildings in both Montreal and Canada.

7. Montreal Biosphere - Quebec, Canada

The Biosphère is a museum in Montreal dedicated to the environment. It is located at Parc Jean-Drapeau, on Île Sainte-Hélène in the former pavilion of the United States for the 1967 World Fair Expo 67. The structure is used prominently in the original Battlestar Galactica television series episode, "Greetings from Earth". Scenes for Robert Altman's post-apocalyptic ice age film Quintet were shot on site as well.

8. Cubic Houses - Rotterdam, Netherlands

Kubuswoningen, or cube houses, are a set of innovative houses built in Rotterdam and Helmond in The Netherlands, designed by architect Piet Blom and based on the concept of "living as an urban roof": high density housing with sufficient space on the ground level. Blom tilted the cube of a conventional house 45 degrees, and rested it upon a hexagon-shaped pylon. His design represents a village within a city, where each house represents a tree, and all the houses together, a forest.

9. Cathedral of Brasilia, Brazil

The Cathedral of Brasília is the Roman Catholic cathedral serving Brasília, Brazil, and serves as the seat of the Archdiocese of Brasília. It was designed by Oscar Niemeyer, and was completed and dedicated on May 31, 1970. The cathedral is a hyperboloid structure constructed from 16 concrete columns, weighing 90 tons each.

10. National Centre for the Performing Arts, China

The National Centre for the Performing Arts (NCPA), and colloquially described as The Giant Egg, is an opera house in Beijing, People's Republic of China. The Centre, an ellipsoid dome of titanium and glass surrounded by an artificial lake, seats 5,452 people in three halls and is almost 12,000 m² in size. It was designed by French architect Paul Andreu. Construction started in December 2001 and the inaugural concert was held in December 2007.