wk-tatsu (Los Angeles Times photo by Myun J. Chun / May 9, 2006)

GeorgiaSix Flags Over Georgia, Austell, $53/$37/$37: Dare Devil Dive, coaster with beyond-vertical drop. Six Flags White Water, Marietta, $37/$27/$30: Black River Falls, "dark" slide.

IllinoisSix Flags Great America & Hurricane Harbor, Gurnee, $60/$40/$40: Riptide Bay, 4-acre water park expansion.

Maryland — Six Flags America, Bowie/ Mitchellville, $55/$37/$37: ZoomAzon Falls, half-mile of body slides.

MassachusettsSix Flags New England, Agawam, $47/$37/$37: Houdini — The Great Escape, combination ride/show.

Missouri — Six Flags St. Louis, Eureka, $47/$37/$37: Screamin' Eagle, classic wooden coaster.

New Jersey — Six Flags Great Adventure, Jackson, $60/$37/$37: Green Lantern, stand-up coaster. Six Flags Hurricane Harbor, Jackson, $40/$30/$33: Blue Lagoon, million-gallon wave pool. Six Flags Wild Safari, Jackson, $22/$22/$22: Drive-through wildlife preserve.

New York — The Great Escape & Splashwater Kingdom, Lake George, $47/$35/$42: Alpine Bobsled, trackless coaster. Six Flags Great Escape Lodge & Indoor Waterpark, Queensbury, rates vary: Family-suite hotel with indoor water park.

Texas — Six Flags Fiesta Texas, San Antonio, $55/$40/$35: Ovation, Broadway revue with special effects. Six Flags Hurricane Harbor, Arlington, $28/$22/$22: Raging Rapids, tubing on a series of six pools. Six Flags Over Texas, Arlington, $57/$37/$37: El Aserradero, world's first log flume ride.

Canada — La Ronde, Montreal, Quebec, $48/$34/$43: Dragon, indoor "dark" coaster.

Mexico — Six Flags Mexico, Mexico City, $32/$24/$23: The Van Helsing Experience Live!, interactive vampire hunt.

Did you know …

Six Flags lays claim to being the first one-price admission park in the world, starting in 1961 ($2.95 plus tax). This was huge; you didn't have to pay for each ride.

It boasts the tallest coaster in the world and fastest in North America: The Kingda Kat in Jackson, N.J., at 456 feet and 128 mph.

Six Flags coasters travel 25 million miles a year.

On a clear day, you can see the White House, the Capitol and Washington Monument from the top of Superman: Ride of Steel, in Mitchellville, Md.