10362 Avenida Cinco de Mayo A truly majestic, castle-inspired custom estate in Fountain Valley's prestigious Colony neighborhood! Built in 2005, this extraordinary 6 bedroom, 4 bath residence offers 4, 104 square feet of grand living space, a 3-car garage, and an expansive driveway with parking for 4 additional vehicles. Commanding curb appeal showcases stately columns, graceful arches, stacked-stone accents, Palladian windows, wrought-iron balconies, and richly detailed stone planters. Beyond the double-door entry, a breathtaking two-story foyer introduces soaring ceilings, gleaming polished natural-stone floors, elaborate crown molding, coffered ceilings, magnificent chandeliers, and a sweeping stone staircase adorned with ornate wrought-iron railings. Spectacular formal living and dining areas are designed for entertaining, highlighted by dramatic windows and a striking stone fireplace. The spacious family room features a beamed ceiling, its own stone fireplace, and a sun-filled bay-window breakfast nook, flowing seamlessly into the gourmet kitchen with granite countertops, a massive center island with wraparound seating, stainless-steel appliances, rich cherry-toned cabinetry, glass-front displays, and a walk-in pantry with etched-glass door. French doors invite indoor-outdoor living beneath an expansive columned covered patio overlooking the generously sized, low-maintenance backyard. Two main-level guest bedrooms and an inside laundry room with utility sink add flexibility and convenience. Upstairs, an expansive loft/bonus room and broad open hallway offer versatile space for a lounge, study area, or home office. Retreat through the double doors of the palatial primary suite, featuring a private sitting retreat, beautiful wood-look flooring, and French doors to a balcony overlooking the backyard. Its lavish spa-inspired bath boasts a jetted soaking tub, separate stone-surround shower with bench, dual-sink vanity, and mirrored French doors opening to the walk-in closet. Additional highlights include dual-pane windows, recessed lighting, raised-panel doors, dual-zone A/C, and a finished 3-car garage with tile flooring. Ideally located near Mile Square Regional Park, golf, shopping, dining, schools, and a short drive to the beach, this architectural showpiece offers an exceptional opportunity to enjoy grand-scale Fountain Valley living!