Why does the Peace Tower bell ring every 15 minutes?

When was the building 16 sheridan avenue in downtown Albany built? How long does it take to ride the roller coaster The Beast? What ocean is found at 20 south and 100 east? How do you derestrict a piaggio liberty 50? What do people build to cross deep rivers and valleyes? Has any body from the UK ever climbed mount Everest? How many leagues deep is the Atlantic ocean? What have witnesses said about the Loch Ness monster? What city is the western wall located? What is the bridge length of a 53 foot trailer? What are the characteristics of a coral reef? What is the Erie ring? Who opened London Bridge? Are rivers a source of fresh water? Are Zoos cages too small? What was a canal from Chang Jiang River to Guangzhou used to supply troops? What is the bridge that goes from Manhattan to Astoria? What is strasbourg near? WHY did Mose's mother put him in a basket to float down the river? Who built the lighthouse in Alexandria?