It's about one-third as tall as a Mauna Loa
In other words, 3,000 meters is 0.32720 times the height of a Mauna Loa, and the height of a Mauna Loa is 3.056 times that amount.(Hawaii) (Hawaiian island volcano) (total height from seafloor)
Mauna Loa, one of the five volcanoes which forms the island of Hawaii and the tallest mountain in total height in the world, rises to 9,168 m above the seafloor. The peak of Loa is home to the approximately 6,000 sq. m (0.6 ha) Lake Waiau, one of the highest altitude lakes in the United States outside of Colorado.
It's about three times as tall as Angel Falls
In other words, 3,000 meters is 3.06 times the height of Angel Falls, and the height of Angel Falls is 0.3270 times that amount.(a.k.a. Parakupa-vena, a.k.a. Kerepakupai mer&) (Auyantepui, Canaima National Park, Venezuela) (total height)
Angel Falls has a total height 979 m. Jimmie Angel, the first person to publicize their existence outside Venezuela and the namesake of the falls, damaged his monoplane atop the falls and was forced to abandon it; it remained there until it was removed 33 years later.
It's about three times as tall as Tugela Falls
In other words, 3,000 meters is 3.160 times the height of Tugela Falls, and the height of Tugela Falls is 0.3160 times that amount.(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 three-and-a-half times as tall as Olo'upena Falls
In other words, 3,000 meters is 3.3330 times the height of Olo'upena Falls, and the height of Olo'upena Falls is 0.30 times that amount.(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 three-and-a-half times as tall as Burj Dubai
In other words, 3,000 meters is 3.620 times the height of Burj Dubai, and the height of Burj Dubai is 0.2760 times that amount.(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 three-tenths as deep as The Challenger Deep (Marianas Trench)
In other words, 3,000 meters is 0.275180 times the depth of The Challenger Deep (Marianas Trench), and the depth of The Challenger Deep (Marianas Trench) is 3.6340 times that amount.(near Marianas Islands, a.k.a. Ladrones Islands, northwestern Pacific Ocean) (depth below sea level)
The Challenger Deep, at the southern end of the Marianas Trench, reaches a depth of 10,902 meters below sea level. The first manned expedition to the bottom of Challenger Deep took 4 hours and 48 minutes in 1960. This was the only manned descent to the floor of the Trench until 2012, when director James Cameron made the trip; several other descents have been made since then.
It's about one-fourth as tall as Maxwell Montes
In other words, 3,000 meters is 0.270 times the height of Maxwell Montes, and the height of Maxwell Montes is 3.70 times that amount.(Ishtar Terra, Venus)
Maxwell Montes rises to a total height of 11,000 meters. Since Venus does not seem to have the kind of tectonic activity which gives rise to mountains on Earth, the origin of the Venusian mountain remains the subject of some dispute.