Playa de las Américas and Los Cristianos: These connected resort towns (15-20km, 20 minutes) are Tenerife's main tourist areas. Los Cristianos is older, more Spanish, with pleasant harbor, ferry port to La Gomera island, and family-friendly beaches. Playa de las Américas is purpose-built resort with long beaches (Troya, Las Vistas), nightlife (Veronicas Strip famous for clubs and bars), shopping centers, restaurants, and all-inclusive hotels. The area is busy, commercial, and international - English, German widely spoken. Excellent infrastructure for tourism but not authentically Spanish. Beaches have golden imported sand (Tenerife's natural beaches are black volcanic sand).

Costa Adeje: This upscale area (20km, 25 minutes) north of Playa de las Américas features luxury hotels, Siam Park (one of world's best water parks), pristine beaches (Playa del Duque, Fañabé), upscale shopping (Plaza del Duque), gourmet restaurants, and sophisticated atmosphere. Costa Adeje targets higher-end tourism - 5-star resorts, spa hotels, golf courses. The area is more refined than Playa de las Américas - preferred by those seeking quality over party atmosphere. Beaches are excellent with calm water.

Mount Teide National Park: Spain's highest peak (3,718m) and UNESCO World Heritage site (50km from airport, 1 hour) is Tenerife's top attraction. The volcanic landscape is otherworldly - moon-like terrain, colored rocks, dramatic formations like Roques de García. Cable car (teleférico) takes visitors to 3,555m for spectacular views (final summit requires permit and fitness). The park is stunning - allow full day. Temperatures 10-15°C cooler than coast - bring warm clothes. Star-gazing tours popular - park is protected dark sky reserve. Snow possible December-April at summit. The volcano last erupted 1909.

Los Gigantes Cliffs: These spectacular vertical cliffs (35km northwest, 45 minutes) plunge 500-800m directly into Atlantic Ocean - among Europe's highest sea cliffs. Los Gigantes resort at cliff base offers boat tours for best views, whale/dolphin watching (pilot whales resident year-round), and small black sand beach. The cliffs are dramatic and impressive - best viewed from water. The resort is quieter than Playa de las Américas - good base for those seeking tranquility.

Whale and Dolphin Watching: Waters between Tenerife and La Gomera are year-round home to pilot whales (resident population 250+) and bottlenose dolphins. Boat tours from Los Cristianos, Puerto Colón (Costa Adeje), Los Gigantes offer 2-3 hour trips with very high success rate (90%+ sightings). The area is one of world's best for cetacean watching. Tours include swimming stops at secluded bays. Some operators have 'Blue Boat' certification for responsible watching.

La Gomera Day Trip: Ferry from Los Cristianos (50 minutes) reaches La Gomera island - dramatically different from Tenerife. La Gomera features lush green laurel forests (UNESCO World Heritage), dramatic ravines, Whistling Language (Silbo Gomero, UNESCO Intangible Heritage), traditional villages, and unspoiled nature. Day trips popular but overnight stay recommended to appreciate the island's tranquility and hiking opportunities. La Gomera is much less developed - authentic, peaceful, beautiful.

South vs North Tenerife: Tenerife South Airport serves sunny, dry, warm southern coast - 300+ days sunshine/year, 22-28°C, desert-like landscape. North is greener, cloudier, cooler, more traditionally Spanish - served by Tenerife North Airport. Most tourists stay in south for guaranteed sunshine. Mount Teide creates weather barrier - south stays dry while north gets rain/clouds. Southern beaches are mostly man-made golden sand or natural black volcanic sand. Tourism is southern Tenerife's main industry - purpose-built resorts dominate.