Moeraki Boulders

According to the Moeraki website:

'The Moeraki Boulders are a number of huge spherical
stones, found strewn along a stretch of Koekohe Beach
near Moeraki, a small settlement just south of Hampden
on New Zealand's Otago coast. These boulders are grey-
coloured septarian concretions which have been exposed
through shoreline erosion from black mudstone coastal cliffs
that back the beach. They originally formed in ancient sea
floor sediments during the early Paleocene some 60 million
years ago. The boulders weigh several tonnes and are up to
three metres in diametre. Maori legend tells that the boulders
are remains of calabashes, kumaras and eel baskets that washed
ashore after the legendary canoe, the Araiteuru was wrecked at
nearby Shag Point (Matakaea).'

What this extremely dry scientific explanation fails to capture
is that, for a bunch of rocks, these things are SERIOUSLY COOL!
Wandering around the beach, checking out the various globes,
stretching out on top of them, poking at the tiny muscles that cling
to their cracks, checking out the hollow interiors of the broken ones,
was one of the most entertaining things I've done so far in New Zealand.
Definitely something to check out if you are in this part of the world!
Moeraki, New Zealand, August 8, 2009.