Lagos is the Commercial capital of Nigeria while Abuja is the Capital. Lagos is a large city. The drive from Lagos airport to Victoria Island (called VI) is about 2 hours in peak traffic conditions. A couple of lovely bridges form the drive from the Airport to VI.
Lagos and Nigeria have several pristine unspoilt beaches. I visited the main beach in Lagos - the Bar Beech. The Government of Lagos is building it on the lines of Queens Necklace or Narimal Point. The beech is clean and the White sand is nice. The crowd is totally variant - from kids playing soccer to people praying to a casual walker.