A drop tower or big drop is a type of amusement park ride incorporating a central structure or tower. Drop towers vary in height, passenger capacity, lift type, and brake type. Many are custom-made, although there are some mass-produced designs. The most widely sold drop towers have been manufactured by Intamin and S&S Sansei, however Larson International and Funtime have their own drop tower models available as well. Riders initially experience a sense of weightlessness via free fall, followed by rapid deceleration, after which a magnetic brake system brings the ride to a stop. The entire experience generally lasts less than one minute.

Intamin Amusement Rides is a design and manufacturing company in Schaan, Liechtenstein, best-known for designing and constructing thrill rides and roller coasters at dozens of international theme parks, amusement parks and other establishments. The Intamin brand name is a syllabic abbreviation for " international amusement installations". The company has corporate offices across the world, including three in Europe, three in Asia, and two in the United States.