It's about one-and-one-tenth times as heavy as Christ the Redeemer (statue).
In other words, 688 tonnes is 1.08 times the weight of Christ the Redeemer (statue), and the weight of Christ the Redeemer (statue) is 0.9260 times that amount.(a.k.a. O Cristo Redentor, a.k.a. Christo redemptor) (Rio de Janeiro, Brazil)
Christ the Redeemer weighs 635 tonnes. The statue overlooks the city of Rio de Janeiro from atop the 709.9-meter (2,329 ft) granite peak in the Tijuca Forest National Park.
It's about half as heavy as a Tree (Sierra Redwood).
In other words, 688 tonnes is 0.530 times the weight of a Tree (Sierra Redwood), and the weight of a Tree (Sierra Redwood) is 1.90 times that amount.(a.k.a. Giant Sequoia, a.k.a. Sierran redwood, a.k.a. Wellingtonia, a.k.a. "Big Tree", Sequoiadendron giganteum)
The weight of wood in a Giant Sequoia is 1,300 tonnes. General Sherman, a specimen in Sequoia National Park in Visalia, California, is the largest tree in the world by volume, with an estimated weight of about 1,900 tonnes.
It's about four-and-a-half times as heavy as a House.
In other words, 688 tonnes is 4.410 times the weight of a House, and the weight of a House is 0.2270 times that amount.(149 sq. m, single-level, unfurnished)
A 149 sq. m (1,600 sq. ft), single-story, unfurnished house (without extensive masonry) of the type commonly found in America would weigh approximately 156 tonnes, based on the weight of the included materials. In contrast, a yurt — a type of dwelling structure popular among nomadic peoples of East Asia — typically weighs less than 0.460 tonnes.
It's about six-and-a-half times as heavy as a Blue Whale.
In other words, 688 tonnes is 6.580 times the weight of a Blue Whale, and the weight of a Blue Whale is 0.1520 times that amount.(Balaenoptera musculus)
Blue whales weigh between 105 tonnes. The largest mammal to have ever lived, blue whales feed almost exclusively on krill — tiny invertebrates weighing about 0.000001000 tonnes each.
It's about nine-and-a-half times as heavy as The Space Shuttle.
In other words, the weight of The Space Shuttle is 0.10 times 688 tonnes.(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 71 tonnes. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 20 tonnes.
It's about one-fifteenth as heavy as The Eiffel Tower.
It's about one-twentieth as heavy as The Brooklyn Bridge.
In other words, 688 tonnes is 0.05165 times the weight of The Brooklyn Bridge, and the weight of The Brooklyn Bridge is 19.360 times that amount.(a.k.a. New York and Brooklyn Bridge) (Manhattan and Brooklyn, New York City, New York) (total weight)
The total weight of the Brooklyn Bridge is approximately 13,320 tonnes. In a promotional event to prove the bridge's stability shortly after it opened, entertainer P. T. Barnum led a parade of 21 elephants across it in May of 1884.