Drill straight through the center of the Earth from Jakarta, Indonesia and you'd surface on the exact opposite side of the planet — its antipode.
Jakarta's antipode sits at 6.21°N, 73.15°W, in the northern hemisphere, west of Greenwich. That places it in or near the Pacific Ocean.
It lies roughly 20,015 km from Jakarta — about as far apart as two points on Earth can possibly be. And the relationship is symmetric: the antipode of that spot is, of course, right back here in Jakarta.
Jakarta's antipode is a rare one: it actually lands on solid ground, about 1 km from San Cayetano, a locality in Colombia. Most cities don't get that lucky — antipodal land pairs are uncommon since water covers about 71% of the globe.
Antigea's live map shows the satellite view, the closest Street View, and the local time on the other side of the world.