Buildings and structures completed in 1991

Perlan (; English: The Pearl) is a natural history museum in Reykjavík, Iceland. It is situated on the top of Öskjuhlíð hill. It was initially only a cluster of hot water tanks, but on June 21, 1991, the building was opened to the public. The building consists of a glass dome resting on top of six district heating tanks. Four of them are still in use, one hosts an ice cave, and one has been turned into a planetarium.

large statue in Sendai, Japan

23 m metronome in Letná Park, Prague, Czechia, built in 1991

mausoleum in Ganja, Azerbaijan

building in India

twin-tower skyscraper in Rotterdam

seaport in Barcelona

architectural structure

Sport Arena in Granollers

observatory in Enbekshikazakh District, Almaty Region, Kazakhstan

Herb garden in Kobe, Japan

First convention center of Thailand

cultural center in Jaipur

Tallest building in Wellington, NZ

park in Sydney, New South Wales, Australia