It has an area of 130 square kilometers (50 sq mi) and reaches an elevation of 343 meters (1,125 ft) above sea level.

The island does not receive visitors, although the surrounding water is used by aquatic divers on organized tours.

[1] The English pirate William Ambrosia Cowley charted the island as Bindlos's Island in 1684, naming it in honor of Robert Byndloss, a chief justice of Jamaica who was related by marriage to Henry Morgan and generally sympathetic to pirates, buccaneers, and privateers.

[2] Marchena has an area of 130 square kilometers (50 sq mi) and reaches an elevation of 343 meters (1,125 ft) above sea level.

[citation needed] Marchena's caldera is unusual, however, in that it has been almost completely filled with young lavas, some of which has spilled over and down the sides.