What is the historical development of tourism?

Why was the London Bridge built? How much does it cost to get into Newark museum? Will the World Trade Center in New York be rebuilt? How many Dams are there in river Pamba? How many hotels are there near the Grand Canyon? Why are a majority of ancient swords found in river beds? What body of water does the quebec bridge cross? How many people does it take to build Taj Mahal? What city was built on a oasis? Average salinity of water of Arabian sea is? The acropolis was the most important city state why? What is the name of the bridge over the Thames? Can terrain refer to a desert? Where is the amazon rainforest distributed? What is the lake in Florida? What is the size of lake Ontario? How big is the size of the Stonehenge? Where is holetown located? How long does it take a rain drop to travel through the Mississippi river? How has the Tigris and Euphrates river valley affected settlement patterns in present-day Iraq?