America/Tortola is a timezone and its consensus geometry is derived from woedb.
{"mz:is_ceased":0,"geom:latitude":18.511153,"wof:name":"America/Tortola","counts:names_total":1,"wof:placetype":"timezone","gp:source":"geoplanet 7.6.0","mz:is_current":-1,"wof:hierarchy":[{"continent_id":-1,"country_id":-1,"timezone_id":102047699}],"mz:is_deprecated":0,"lbl:latitude":18.429975,"geom:area":0.014612,"geom:longitude":-64.517539,"wof:id":102047699,"counts:concordances_total":1,"geom:type":"MultiPolygon","wof:lastmodified":1566655684,"wof:fullname":"America/Tortola","wof:belongsto":[],"wof:concordances":{"gp:id":28350803},"mps:latitude":18.429975,"wof:repo":"whosonfirst-data-admin-xy","wof:lang":["eng"],"src:geom":"woedb","wof:country":"","counts:names_preferred":1,"src:geom_alt":[],"geom:area_square_m":1.71327584013727E8,"wof:tags":[],"counts:names_variant":0,"wof:breaches":[],"edtf:inception":"uuuu","iso:country":"","counts:names_languages":1,"geom:bbox":"-64.83181,18.312737,-64.268768,18.757221","name:eng_x_preferred":["America/Tortola"],"mps:longitude":-64.640699,"src:lbl_centroid":"mapshaper","wof:superseded_by":[],"wof:supersedes":[],"lbl:longitude":-64.640699,"wof:geomhash":"da1deaa2267acf28ad3aed827170ac3d","wof:parent_id":-1,"wof:placetype_names":["timezone"],"mz:hierarchy_label":1,"wof:placetype_id":136057795,"edtf:cessation":"uuuu"}