Information you can follow.

Research here means checking information used in our visitor guidance and cultural writing. It does not mean that Apollonaut operates a laboratory, employs an academic research department or has completed original scientific studies.

For opening hours, admission and visitor rules, the first source is One World Observatory’s own website. For the history of the tower and the site, we used general references that cite their sources. All can be read directly through the links provided.

1. 01

   Start with the relevant source

   Use the venue for its own visitor rules and history. Use an identified reference for dates, architecture and institutional facts.

2. 02

   Keep time-sensitive details dated

   Prices, opening hours, holiday closures and eligibility can change. A past arrangement or old tariff must not become a current promise.

3. 03

   Separate fact from interpretation

   A sourced date is different from an editorial impression. Make the distinction clear in the writing.

4. 04

   Keep uncertainty visible

   If sources disagree or a detail is unverified, omit the claim or explain the limit. Sources give 28 or 29 May 2015 for the observatory’s opening, so we say May 2015.

A starting price, a venue admission price and the total charged for a booking are different figures. A useful comparison must identify the same access, visitor category, date, currency and included fees.

Our prices are in US dollars and include our service fee, so they are higher than One World Observatory’s own admission prices in US dollars. We do not claim the lowest price or publish a market comparison.

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The aim is to make source links and meaningful updates easy to find. A material correction should explain what changed rather than quietly leaving contradictory information elsewhere on the site.

The heritage and history copy was checked against the reading links below on 9 November 2026. This date records that review; it is not a guarantee that future opening hours or admission rules will remain the same.