World’s Largest M in Platteville, Wisconsin

Four miles northeast of Platteville, Wisconsin, a colossal white "M" stands as the world's largest, dominating the landscape at 241 feet high and 214 feet wide. The landmark, set at a 45-degree angle and facing south, pays tribute to the region's mining heritage.

In 1924, Platteville's engineering club sought to challenge Colorado School of Mines, which had already erected a "M" on Mount Zion near its campus. The engineering schools engaged in a friendly rivalry. Platteville, though lacking Colorado's prestige, was determined to make its mark—literally.

For 12 years, the project remained dormant until 1936 when engineering students Pat Medley and Alvin Knoerr revived the idea. They climbed Platte Mound and carved a giant "M" into the snow, a prank that became so popular that plans for a permanent "M" were underway the following year.

With landowner permission and university support, students began construction in 1937, using 400 tons of limestone. The "M" has been meticulously maintained ever since, with periodic upgrades to ensure its bright, bold appearance. The landmark even made appearances in popular culture, such as Life magazine in 1949 and being lit up for special occasions by MTV.

In 1987, MTV turned the "M" into a music channel logo when 650 students formed the channel's initials on the mound. Platteville's efforts paid off, as the city became the only one in the country to host Disney's Mickey's Hometown Parade on July 4, 1998. Members of the Platteville Jaycees organized the parade, with 250 people dressed as Mickey Mouse ears accompanying the "M."

Today, the giant "M" can be visited year-round. For those daring enough, climbing the over 200 stairs to the top offers a unique perspective of this iconic landmark.