In 1906, what became the first U.S. national monument?
In 1906, what became the first U.S. national monument?
Answer: The first U.S. national monument, designated in 1906, is Devils Tower. Located in northeastern Wyoming, it was established by President Theodore Roosevelt under the Antiquities Act. This act gave the president the authority to create national monuments from public lands to protect significant natural, cultural, or scientific features.
Summary: Devils Tower in Wyoming became the first U.S. national monument in 1906, established by President Theodore Roosevelt.