The Tomb of Seti I (KV17) is the longest and most elaborately painted tomb in the Valley of the Kings, descending 136 metres into the limestone cliffs through a series of decorated corridors and chambers. The paintings cover virtually every surface and represent every major text of the Egyptian royal funerary tradition: the Book of the Gates, the Book of Caverns, the Litany of Ra, and the Amduat. The colours are extraordinary — after 3,200 years they retain a vividness that makes many tourist photos look like they have been digitally enhanced.
The tomb was closed for much of the late 20th century due to deterioration and the complexity of restoration work. It reopened with a separate high-price ticket designed to limit visitor numbers. The cost is significant, but this is the most impressive individual tomb in Egypt, far outshining even the famous tomb of Tutankhamun. If you are going to pay extra for one tomb, make it this one rather than Nefertari's — both are spectacular, but Seti's is on a different scale of ambition.