Have you seen evidence with your own eyes which suggests that the earth is a globe?
is there one end all be all fact or argument that proves 100% that the world is flat?
Polar explorer James Clark Ross' 60,000 mile journey along Antarctica is pretty conclusive.
From page 348 of his final volume of South Sea Voyages we read:
"At noon we were in Lat 49° 20' S. and Long 37° 24' E. A light breeze originated from the north-west. Having been done with our mission we made all sail for the Cape of Goodhope."
...
"In the final narrative of our four year voyage of the Antarctic seas, I must only further observe, that, amongst the many events which has occurred to call fourth our gratitude to God for his guidance during the arduous and hazardous operations in which we have been engaged over the last 62,400 miles. It was most unfortunate that we had lost several of our crew members to sickness and drowning. Their memories will live on in our hearts and minds, as a bastion to the relentless aspirations of man and his never ending avidity for the exploration of new frontiers."
The HMS Challenger later reported a voyage of around 70,000 miles while circumnavigating the Southern Seas. From proof number 78 of
"100 proofs The Earth is Not a Globe" by Thomas Winship we read:
"Yes, but we can circumnavigate the South easily enough," is often said by those who don't know, The British Ship Challenger recently completed the circuit of the polar Southern region - indirectly, to be sure - but she was three years about it, and traversed nearly 69,000 miles - a stretch long enough to have taken her six times round on the globular hypothesis. This is a proof that Earth is not a globe."
Looking into the topic further, we can find
numerous references to the Challenger's 70,000 mile voyage around the southern polar region:
"The ship sailed from Portsmouth under the command of Captain George Nares and the scientific supervision of Thomson himself, traveled nearly 70,000 miles surveying and sampling the southern reaches of the Atlantic and Pacific Oceans and Indian Oceans. Their scientific brief, carried out at 362 sampling stations, was to determine the ocean depth, the composition of both shallow and deep water, the speed and direction of surface currents (and, where possible, subsurface currents), as well as noting the prevailing atmospheric conditions and taking samples of local plant and animal life."