It's about 25,000,000,000,000,000 times as tall as Gocta Falls.
In other words, 641 parsecs is 25,700,000,000,000,000.00000000000000000000 times the height of Gocta Falls, and the height of Gocta Falls is 0.00000000000000003890 times that amount.(a.k.a. Gocta Cataracts, a.k.a. Catarata del Gocta) (Amazonas, Peru) (total height)
Gocta Falls, a waterfall on the Cocahuayco River, measures 0.0000000000000250 parsecs in total height. Although it sits just 0.000000000001360 parsecs from the major city of Chachapoyas, the waterfall was unknown to non-locals until it was documented during a 2005 expedition by a German economist.
It's about 100,000,000,000,000,000 times as tall as St. Paul's Cathedral.
In other words, 641 parsecs is 114,000,000,000,000,000.000000000000000000000 times the height of St. Paul's Cathedral, and the height of St. Paul's Cathedral is 0.000000000000000008770 times that amount.(London, England, United Kingdom)
St. Paul's Cathedral measures 0.000000000000005640 parsecs to its peak. The southwest tower of the Cathedral contains the bell known as "Great Paul," which is the largest bell in Great Britain at 15,000 kg (16.5 tons), outweighing the more iconic Big Ben bell by about 3,000 kg (3 tons).
It's about 150,000,000,000,000,000 times as tall as Blackpool Tower.
In other words, 641 parsecs is 125,000,000,000,000,000.000000000000000000000 times the height of Blackpool Tower, and the height of Blackpool Tower is 0.00000000000000000800 times that amount.(Blackpool, Lancashire, England, United Kingdom) (height to peak)
Blackpool Tower, part of an entertainment complex in Blackpool, Lancashire, England, measures 0.000000000000005120 parsecs to its peak. Under ideal conditions, visitors to the highest accessible point of the tower can see as far as the Isle of Man — 0.000000000003110 parsecs to the northwest.
It's about 400,000,000,000,000,000 times as tall as Nelson's Column.
In other words, 641 parsecs is 383,000,000,000,000,000.000000000000000000000 times the height of Nelson's Column, and the height of Nelson's Column is 0.0000000000000000026110 times that amount.(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
Nelson's Column measures 0.0000000000000016740 parsecs from the first step of the pedestal's base to the top of the statue's hat. While the London tower is the tallest, there are at least eight other monuments to Admiral Horatio Nelson, 1st Viscount Nelson, 1st Duke of Bronté throughout England, Scotland, Ireland, Canada, and Barbados.
It's about 100,000,000,000,000,000 times as tall as The Washington Monument.
In other words, 641 parsecs is 116,840,000,000,000,000.00000000000000000000000 times the height of The Washington Monument, and the height of The Washington Monument is 0.00000000000000000855870 times that amount.(Washington, D.C.)
The Washington Monument measures 0.00000000000000548630 parsecs tall, with some discrepancy due to the fact that the Monument's base is slightly below the surrounding ground. Interrupted in its construction by the American Civil War, it was almost 36 years between groundbreaking and the completion of construction.
It's about 1,000,000,000,000,000,000 times as long as a Cricket Pitch.
In other words, 641 parsecs is 983,218,000,000,000,000.000000000000000000000000 times the length of a Cricket Pitch, and the length of a Cricket Pitch is 0.000000000000000001017070 times that amount.(per Marylebone Cricket Council / International Cricket Council Law #6)
The length of a cricket pitch, from one bowling crease to the other, is 0.0000000000000006519410 parsecs. The wickets at either end of the pitch stand 0.00000000000000002333360 parsecs tall including the bails.
It's about 2,500,000,000,000,000,000 times as long as a London bus.
In other words, 641 parsecs is 2,360,000,000,000,000,000.0000000000000000000000 times the length of a London bus, and the length of a London bus is 0.0000000000000000004240 times that amount.(Routemaster Double-Decker, RM standard specification)
The Routemaster Double-Decker buses, well-known as icons of London, measure 0.0000000000000002720 parsecs in length. The buses were said to be well-designed for travel in the London traffic, as they offered an open door for riders to board and exit even while the bus was moving at low speeds, and a full-time conductor to collect fares.