Segways move groups through Balboa Park amid stunning architecture; city tours put downtown and Gaslamp Quarter in the spotlight

Passengers pilot mini speedboats and receive direction via two-way radio from an experienced guide; 13-mile harbor tour

Guides lead double kayaks along the coast and into secluded caves, pointing out potential sightings of dolphins and leopard sharks

Watch country scenery roll by in a 10-mile round trip aboard a diesel-electric train, then see antique locomotives up close in the museum

Nightclub-style playground with booming stereo system and light show; large inflatables, including climbing wall; outer-space theme

World-class surfer & photographer Tom English pairs paddleboarders with rental equipment or personal instruction & digital photos

High-quality digital projections and sounds entertain patrons as they munch popcorn in any of 12 theaters

Lessons impart the basics of paddleboarding or surfing on the water through multistep programs designed for students 6 or older

Eco-friendly electric karts; speeds up to 45 mph; karts for kids and adults; collection of racing memorabilia on display

Paranormal walking tour visits various sites of haunted history, from eerie backstreets to the hangouts of gamblers and gunmen