When a giant wants to put a ring on it, what can he or she do? Maybe reach for one of these beautiful marvels of architecture. Some of them are ring-shaped, some are other open shapes — but they all achieve an incredible marvel of negative space.

The Hirshhorn Museum, Washington D.C., designed by Gordon Bunshaft, opened in 1974

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(via Wikimedia Commons, EPSfiles, Google Maps and TFAOI)

The 25-floor Fang Yuan Building, an office building located in Shenyang, China, opened in 2001

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(via imgur)

The Government Communications Headquarters (GCHQ), also known as The Doughnut, Cheltenham, England, with a diameter of 600 ft (180 m), opened in 2004.

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(via Wikimedia Commons)

Tietgen Dormitory, Copenhagen, Denmark, designed by Lundgaard & Tranberg Architects, opened in 2006

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(via Lundgaard & Tranberg Architects and Google Maps)

Emergency And Infectious Diseases Unit of Skåne University Hospital, Malmö, Sweden, designed by C.F. Møller and Link Arkitektur, built between 2006 and 2011

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(via C.F. Møller, Designboom and Google Maps)

The 768 ft (234 m) tall China Central TV (CCTV) Headquarters in Beijing, China, designed by Office for Metropolitan Architecture (the architecture firm of the legendary Rem Koolhaas), opened in 2012

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(via Jim Gourley and Arup)

The Sheraton Huzhou Hot Spring Resort, a 27-story building in Huzhou, China, by MAD Architects, unveiled in 2013

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(via MAD Architects)

Phoenix International Media Center, Beijing, China, designed by BIAD UFo, opened in 2013

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(via Thousand Wonders and Todondesign)

The headquarters of the Guangdong Plastics Exchange, also known as the Guangzhou Circle. It's a 453 ft (138 m) tall copper coin-like building designed by AM Projects Milan, which was built between 2010 and 2014.

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(via llee_wu 12 and 準建築人手札網站 Forgemind ArchiMedia)

The Ring of Life, Fushun, China, a 3000-ton, 515 ft (157 m) tall steel circle, used as a landmark with an observation deck.

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(via Designboom)

Apple Campus 2, designed by Foster + Partners, stil under construction

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(via Wikimedia Commons)