Tower Infinity, Proposed observation and leisure tower in Cheongna, Incheon, South Korea

Tower Infinity, also called Cheongna City Tower, is a planned 448-metre observation and leisure tower beside Cheongna Central Lake in Cheongna International City, Incheon. Its design by GDS won a Korea Land and Housing Corporation competition in 2008. The tower is divided into lower, middle and upper sections, with a multi-purpose hall, restaurants, a sky garden and sky lounge in the middle and an observation deck and rooftop terrace at the top.

The tower began as Incheon City Tower, planned during the Cheongna International City development, first as a 113-storey building before switching to a 448 m observation tower. GDS won the 2008 design competition from 146 entries in 46 countries. Military objections over the height stalled the project until a July 2013 agreement with the Incheon Free Economic Zone Authority, which granted permission that August. Construction began in 2019 with POSCO Engineering as builder, after Bosung-Hanyang was selected as developer in November 2016.

The tower's design references chapter 14 of the Daodejing, whose lines on the shapeless and the formless inspired GDS's concept of an "anti-tower". GDS argued that Korea would gain a distinctive position by building a tower defined by absence of presence rather than by height. The name Infinity and the planned LED billboard for events and advertising carry this idea into the building's public role.

The tower has not been built: construction was scheduled to start in 2019, with completion planned for 2024 and handover to the Incheon Free Economic Zone Authority, so there is nothing to visit yet. The site lies in Cheongna International City, Seo-gu, Incheon, beside Cheongna Central Lake. The planned layout is a vertical theme park without offices: low-rise complex facilities, mid-level experience facilities, and symbolic spaces at the top.

High-definition cameras capture surrounding views and project them onto LED screens embedded in the facade. This optical effect makes the tower appear nearly invisible from certain vantage points around it.