There are humans in every photo and video of this thread to help the eye determine the size of things..

A Giant Hangar in Halbe,Germany. (Largest free-standing hall in the world.)
Queen Mary 2 with its Captain
Inside a power station’s cooling tower
Ellison's Cave features the deepest unobstructed pit in the continental US
Dendrocalamus Giganteus also known as Dragon Bamboo, is a species of giant bamboo that is indigenous to Southeast Asia
In 1967, during the Vietnam War, an American soldier held up a Scolopendra subspinipes, a species of giant centipede found throughout Asia
The Crypta Neapolitana, an Ancient Roman Road Tunnel built in 37BC that was in use as a roadway all the way until WW2.
Beachy Head, Eastbourne - South East England
Window cleaners on the World Trade Center, 1979.
Insane perspective on just how immense The Great Pyramid of Giza is
Botanical Park of Rio de Janeiro Brazil. Founded in 1808, it is considered one of the most important in the world
A photo of the Old Cincinnati Library
Petra in south Jordan
A size comparison of a human and a toe of the World's Tallest Statue "Statue Of Unity", India
This meramorphic rock formation called Dragon Eye found in a stone mine

*** 24. Giant Hot Air Balloon of a Head in Yoyogi Park, Tokyo, Japan
French flag that was captured in Malta in 1800
Beaver City, Nebraska resident Audra Thomas poses with a Category F-1 Tornado near her family farm - Kodak Contest Winning photo by Merrilee Thomas, 1989
Crew members standing inside the cargo tank of an LNG tanker.

That's a wrap!