How long is 870 meters?
It's about as long as The Navy Pier

The length of The Navy Pier is about 900 meters.
(a.k.a. Municipal Pier #2) (Chicago, Illinois)
The Navy Pier is 900 m in total length. Originally named Municipal Pier #2, the pier was renamed Navy Pier in 1927 in honor of Naval personnel stationed there during World War I.
It's about as tall as The Three Sisters Falls

The height of The Three Sisters Falls is about 900 meters.
(a.k.a. Cataratas las Tres Hermanas) (Ayacucho, Peru)
The Three Sisters Falls rise to 900 m in height. The falls are called Three Sisters after the three large tiers over which the falls flow.
It's about as tall as Olo'upena Falls

The height of Olo'upena Falls is about 900.10 meters.
(a.k.a. Oloupena Falls) (Molokai, Hawaii)
Olo'upena Falls rise to 900.1 m in height. The isolated falls are the tallest in the United States and the fourth tallest in the world.
It's about one-and-one-tenth times as tall as Burj Dubai

The height of Burj Dubai is about 828 meters.
(formally Burj Khalifa, a.k.a. Dubai Tower, a.k.a. برج خليفة) (Dubai, UAE) (to roof)
Burj Khalifa, the tallest manmade structure in the world, stands 828 m to its roof. The tower also holds the current records for the world's highest Islamic mosque — at approximately 577 m on the 158th floor (of 163 floors) — and the world's tallest outdoor swimming pool — at approximately 285 m on the 78th floor.
It's about nine-tenths as tall as Tugela Falls

The height of Tugela Falls is about 948 meters.
(Royal Natal National Park, KwaZulu-Natal, South Africa)
Tugela Falls rises to 948 m in height. The falls are the highest in Africa and the second highest in the world.
It's about nine-tenths as tall as Angel Falls

The height of Angel Falls is about 979 meters.
(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
It's about one-and-one-tenth times as tall as Gocta Falls

The height of Gocta Falls is about 771 meters.
(a.k.a. Gocta Cataracts, a.k.a. Catarata del Gocta) (Amazonas, Peru) (total height)
Gocta Falls, a waterfall on the Cocahuayco River, measures 771 m in total height. Although it sits just 42,000 meters 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 one-and-two-fifths times as tall as a Canton Tower

The height of a Canton Tower is about 610 meters.
(a.k.a. Guangzhou TV & Sightseeing Tower, a.k.a. 广 州 电 视 观 光 塔) (Guangzhou, China) (to spire)
It's about one-and-three-fifths times as tall as The CN Tower

The height of The CN Tower is about 553.330 meters.
(a.k.a. La Tour CN, a.k.a. Canadian National Tower, a.k.a. Canada's National Tower) (Toronto, Canada) (to spire)
The CN Tower measures 553.33 m tall at its spire. Used only in emergencies and for charitable climbing events, the 2,579-step staircase to the top is the longest metal staircase in the world.
It's about one-and-two-thirds times as tall as The Willis Tower

The height of The Willis Tower is about 520 meters.
(a.k.a. Sears Tower) (Chicago, Illinois) (to antenna peak)
It's about one-and-three-fourths times as tall as The Shanghai World Financial Center

The height of The Shanghai World Financial Center is about 492 meters.
(上海环球金融中 上海環球金融中心, Shànghǎi huánqiú jīnróng zhōngxīn) (a.k.a. SWFC) (Shanghai, China) (to spire)
It's about one-and-nine-tenths times as tall as The Petronas Twin Towers

The height of The Petronas Twin Towers is about 451.90 meters.
(a.k.a. Menara Berkembar Petronas, a.k.a. Petronas Towers) (Kuala Lumpur, Malaysia) (to spire)
It's about half as long as The Preakness Stakes

The length of The Preakness Stakes is about 1,911.096 meters.
(Pimlico Race Course, Baltimore, Maryland) (total race length)
The total race length of the Preakness Stakes run at the Pimlico Race Course is 1,911.096 meters. Dubbed "the race for the Black-eyed Susans" after Maryland's state flower, the winning horse is actually draped with a garland of painted yellow daisies, as Black-eyed Susans do not bloom in time for the late-May race.
It's about two-and-a-half times as tall as The Empire State Building

The height of The Empire State Building is about 381.01 meters.
(New York City, New York) (to top of building)
The Empire State Building stands 381.01 m to its architectural peak. The spire emerging from the top of the building was originally intended to be a mooring mast for blimps whose passengers could disembark onto a landing platform on the 102nd floor of the building.
It's about two-fifths as long as The Kentucky Derby

The length of The Kentucky Derby is about 2,011.680 meters.
(Churchill Downs, Louisville, Kentucky) (total race length)
The total race length of the Kentucky Derby run at Churchill Downs is 2,011.680 meters. First run in 1864, the Kentucky Derby is one of the oldest continuously-running sporting events in America, almost two years older than the Westminster Kennel Club Dog Show