Tom's many adventures still seem wild for a boy his age--even by 21st century standards.
- Tom plays hooky from school in the very first chapter, but he is found out when brother Sid rats him out.
- Tom fights a new boy and wins.
- Tom cons his friends to whitewash the fence--and profits, too.
- Tom trades for Sunday school tickets so he can meet Judge Thatcher.
- Tom disrupts the church with the pinch bug.
- Tom woos Becky Thatcher.
- Tom plans a pirate gang.
- Tom and Huck witness murder in the graveyard.
- The boys escape the murderers and promise to never reveal what they saw.
- Tom gives the cat the painkiller.
- The "pirates" run away to Jackson's Island.
- Tom sneaks back home.
- The boys witness their own funerals, and Tom and Huck become heroes.
- Tom takes licks for Becky's misdeed.
- Tom testifies against Injun Joe and saves Muff Potter.
- Tom and Huck seek the buried treasure.
- Huck and Tom save the Widow Douglas.
- Tom and Becky get lost in the cave.
- Tom and Huck discover the gold and become the richest citizens of St. Petersburg.
There are quite a few things that you could call adventures in this book.
Probably the two most obvious ones are the whole story of Huck and Tom and Injun Joe and, second, the adventure that Tom and Becky have in the cave.
The part where the two of them get lost in the cave is definitely an adventure. After all, they are in danger of dying until they luckily find a way out.
The other story line is similar. The two of them watch Injun Joe kill a man and then they are afraid for their own lives. Then they find out about Injun Joe's treasure and have an adventure as they try to find out where it is (while avoiding Injun Joe and his revenge).