World Bike Adventures cracked open Ecuador’s scene with singletrack trips in 2009. Its 10-day Downhill Safari explores the best rides in Quito and Cuenca. Guests warm up on trails through Incan ruins, then head to Cuenca to ride clay rollers. While in Quito, feast on ceviche at El Ventanal and stay on the flanks of Pichincha volcano at Hacienda Rumiloma, a boutique hotel with killer views. August 20–29, $2,800 per person (includes domestic flight).