score:18
Not quite sure if it qualifies for your definition since the question is slightly vaguish, but King Tut's tomb discovery by Carter in 1922 sounds like a fit.
Another example: Finding the $22Billion treasure in Padmanabha Swamy temple in 2011 in Kerala.
Obviously, the Heinrich Schliemann's finds (Troy itself and Priam's treasure, Treasury of Minyas at Orchomenus, Mycenae finds including Agamemnon's Masl). However, some are debatable - e.g. there are accusations regarding Priam's treasure claiming it was either fabricated or combined from different finds.
This article lists several: http://listverse.com/2007/08/29/top-10-incredible-treasure-troves/ , including:
Another list with plenty of finds:
http://detecting.org.uk/html/Famous_Treasure_Finds_in_the_United_Kingdom.html
There are also plenty of finds of sunken ship treasures:
U.S. explorers find a shipwreck that may hold $240 million in silver from SS Gairsoppa
In Baltic Sea, they recovered 160+ bottles of 200-year-old Champagne.
Nuestra SeΓ±ora de Atocha in 1985 ($450 million)
Upvote:6
There are plenty of examples of long-lost treasures being found, a viking silver hoard pops up in average once a year in Gotland, for example. I don't think there are any cases of anyone actually actively seeking one specific buried treasure finding the intended treasure, and definitely not involving any elaborate series of riddles, maps or traps. Who would be stupid enough to leave a trail when you hide a treasure? You know where it is. Lost treasures are instead generally found by pure luck, or by archaeological examinations of interesting features.
There are however several cases of people looking for sunken ships with large treasures on them, and finding those shipwrecks. No riddles or traps involved though, but lengthy searches. The biggest of the treasures is probably the Nuestra SeΓ±ora de Atocha, found in 1985 after 16 years of searching.
Upvote:8
The dead sea scrolls is certainly one.
Foreign devils on the skilk road by Hopkirk is full for cities buried in the sand, guarded by demons and undead containing long lost treasures and magic. Seriously, it reads like a bad D&D adventure set in Victorian times. But it's all true.