30 Unusual Archaeological Finds In The US We Still Can’t Explain

6. STONE CHAMBERS 

In the hills in Boston, Massachusetts, there are stone chambers, but the Upton Stone Chamber is more famous because of its shape. It has a 14-foot entrance tunnel and a dome which rises about 12 feet. The ancient dome-like structures are known as “beehive tombs,” but archaeologists haven’t uncovered burial remains. No one in the academic field can decipher who built the chamber, but it’s astronomically aligned. It was most likely made to observe the setting solstice sun and the Pleiades star system.