The Explorers Tree is a tree on which Gregory Blaxland, William Lawson and William Charles Wentworth, the explorers who achieved the first known successful crossing of the Blue Mountains of New South Wales by European settlers, carved their initials in 1813. The tree is located at Explorers Hill (also described as Pulpit Hill), about 5 kilometres west of Katoomba, New South Wales. The claim that the explorers carved their initials into the tree is not universally supported.