You're right. I went on a tour to the
California Redwoods(some of the largest
trees in the U.S) and the tour driver
is in the process of setting up tours
in which you will travel across the U.S
to see the "smallest trees" to the largest
in the U.S.(which I believe is on the Oregon
border)...He said he'll have no problem
signing people up in the six figures...
why? because of all the nature and tree
lovers out there!

Another friend took a trip to Mexico and discovered the "olmec" gigantic headstones;
she took pictures and developed them and had wall
"calendars" made(different pictures of the
olmec stones for each month...
What's an olmec head? do a search and learn
more...
http://www.crystalinks.com/olmec.html