ol ith ic ▁including ▁A vel ine ' s ▁H ole , ▁a ▁cave ▁which ▁is ▁the ▁earliest ▁scientific ally ▁dated ▁c emetery ▁in ▁Britain , ▁and ▁several ▁tum uli . ▁There ▁are ▁also ▁several ▁Iron ▁Age ▁hill ▁for ts ▁such ▁as ▁the ▁one ▁at ▁Wor le bury ▁Camp . ▁D ole bury ▁Warren ▁another ▁Iron ▁Age ▁hill ▁fort ▁was ▁re used ▁as ▁a ▁medieval ▁rabb it ▁war ren . ▁The ▁Rom ano - B rit ish ▁period ▁is ▁represented ▁with ▁several ▁sites ▁including ▁vill as . ▁ ▁More ▁recent ▁sites ▁include ▁several ▁mot te - and - ba iley ▁cast les , ▁such ▁as ▁Lock ing ▁Castle ▁and ▁church ▁cross es ▁which ▁date ▁from ▁the ▁Middle ▁A ges . ▁There ▁are ▁also ▁several ▁desert ed ▁medieval ▁settlement s . ▁Wood spring ▁Pri ory ▁is ▁a ▁former ▁August in ian ▁pri ory ▁founded ▁ ▁in ▁the ▁early ▁ 1 3 th ▁century . ▁More ▁recent ▁sites ▁date ▁from ▁the ▁industrial ▁revolution ▁and ▁include ▁the ▁El ms ▁col li ery ▁and ▁glass works ▁in ▁N ail se a . ▁The ▁most ▁recent ▁monuments ▁are ▁two ▁Pal mer ston ian ▁gun ▁batter ies ▁on ▁the ▁island ▁of ▁Ste ep ▁Hol m . ▁ ▁Sed g emo or ▁▁ ▁Sed g emo or ▁district ▁is ▁a ▁low - lying ▁area ▁of ▁land ▁close ▁to ▁sea ▁level ▁between ▁the ▁Quant ock ▁and ▁M end ip ▁hills , ▁histor ically ▁largely ▁mar sh ▁( or ▁mo or ). ▁It ▁contains ▁the ▁bulk ▁of ▁the ▁area ▁also ▁known ▁as