Fossilized seashell concrete?
  • 1 Fossil Shell Beach (Su-san Hoi, literally "Seashell Graveyard") (7 km west of Ao Nang). This overblown tourist attraction has slates of compressed 40 million year old shellfish, which resemble concrete. There's also a small grubby museum and a huge slew of gift shops. This tourist trap is simply not worth the money unless you're a geology student. As the official Krabi tourism website (rather honestly) puts it, "Most are either engrossed to [sic] this or totally indifferent...".200 baht for foreigners, 20 baht for Thais.