Since there are now fewer than seven towers, the name has inspired speculation and argument. The December 2004 tsunami briefly exposed the beachfront near Saluvankuppam (now north of Mahabalipuram), revealing inscriptions and structures. Badrinarayanan said in a BBC report that they dated to the 9th century and may have been destroyed by a 13th-century tsunami. The tsunami also revealed large structures on the seabed about a kilometer offshore, which archaeologists speculate may be the ancient Mahabalipuram. According to a "Science" article, the tsunami exposed rocks with an "elaborately sculpted head of an elephant and a horse in flight", "a small niche with a statue of a deity; another rock with a reclining lion", and other Hindu religious iconography. Marine archaeologists and underwater diving teams have explored a site east of the Shore Temple, one of the monuments, after the 2004 tsunami. This has revealed ruins of fallen walls, a large number of rectangular blocks and other structures parallel to the shore, and the forty surviving monuments.