Lose a lot of weight at the center of the earth
1.) First, you’ll dig 18 miles (30km) through earth’s crust,
2.) then 1800 miles (3000km) through the rock mantle,
3.) then through 1200 miles (2000km) of molten iron and nickel,
4.) then 600 miles (1000km) through solid rock to reach the center, where the heat is 8132°F (4500°C).
By the time you reach your destination you would already have lost a few pounds.
But there’s a bonus; at the center of earth the forces of gravity will be equal on all sides of you, canceling each other, meaning you’ll weigh nothing. Good luck.