Wacky reward: Yankee Stadium turf (freeze-dried in a glass display case)
Issuer: American Express
Required rewards: 8,500 points
How much you have to charge: $8,500 at most on the American Express Gold Card
Wacky reward: Three-day bullfighting and rodeo-clown school
Issuer: Wells Fargo
Required rewards: 37,900
How much you have to charge: $37,900 on a Well Fargo Rewards Card or $12,633 on gas, grocery and drugstore purchases within the first six months of opening the Wells Fargo Rewards Card
Wacky reward: A ride in a NASCAR stock car reaching 180 mph with veteran driver
Issuer: Capital One
Required rewards: 39,000 miles
How much you have to charge: $19,500 on the Venture Rewards card
Wacky reward: African safari through Abercrombie and Kent luxury travel
Issuer: American Express
Required rewards: Starting at 50,000 points
How much you have to charge: $50,000 at most on the American Express Gold Card
Wacky reward: Tandem skydive from 5,000 feet
Issuer: Capital One
Required rewards: 61,000 miles
How much you have to charge: $30,500 on the Venture Rewards card
Wacky reward: One-day diving trip to watch great white sharks from an underwater cage
Issuer: Wells Fargo
Required rewards: 79,700 points
How much you have to charge: $79,700 on Well Fargo Rewards Card, or $26,567 on gas, grocery and drugstore purchases in the first six months of opening the Wells Fargo Rewards Card
Wacky reward: Clinic with USA Water Polo team
Issuer: Capital One
Required rewards: 110,000 miles
How much you have to charge: $55,000 on the Venture Rewards card
Wacky reward: Sideline tickets to the Orange Bowl with passes to Discover's tailgate party and other game events
Issuer: Discover
Required rewards: $225 in cash-back bonus
How much you have to charge: $22,500 on any Discover cash-back card that earns 1 percent back or $4,500 on 5 percent cash-back categories
Wacky reward: Six dogfights in a fighter jet
Issuers: Capital One and Chase
Required rewards: 650,000 miles for Capital One; undisclosed for Chase
How much you have to charge: $325,000 on the Venture Rewards card
Wacky reward: Two-hour ride to 75 miles above the Earth's surface in the Virgin Galactic spaceship (no longer offered)
Issuer: Barclaycard
Required rewards: 20 million points
How much you have to charge: $10 million in gas, groceries and utilities or $20 million on everything else on the Barclaycard Rewards MasterCard