http://goldmiyosgzni37si534ufi2paqujfsz5vlyyxrlox5mpzh6cypkzaid.onion
No there are plenty of legit and valid reasons to visit websites on the Tor network. Visiting the dark web is not illegal (in most countries, some have blocked access) in itself.
You decide yourself if you search/do anything illegal online, be it on the clearnet or dark web.