Some possible stuff of the FAR future (over 10th Millenium)

10,000 Years from now

If a failure of the Wilkes Subglacial Basin "ice plug" in the next few centuries were to endanger the East Antarctic Ice Sheet, it will take up to this long to melt completely. Sea levels would rise 3 to 4 meters.

(One of the potential long-term effects of global warming, this is separate from the shorter term threat of the West Antarctic Ice Sheet.)

50,000 Years from now

The current interglacial period ends sending the Earth back into a glacial period of the current ice age, assuming limited effects of anthropogenic global warming. Niagara Falls will have eroded away the remaining 32 km to Lake Erie, and ceased to exist.

1 quadrillion years from now

Estimated time until the Earth is detached from its orbit around the Sun, due to stellar close encounters (if it is not engulfed by the Sun) 100 quintillion years from now

Estimated time until the Earth collides with the black dwarf Sun due to the decay of its orbit via emission of gravitational radiation, if the Earth is not ejected from its orbit by a stellar encounter or engulfed by the Sun during its red giant phase.