Chile
A full day trip from Valparaiso is the hike up Cerro la Campana. Darwin made the trip up in 1834 and declared it one of the highlights of his journey. It's a 3-4 hour, reasonably tough but non-technical hike up to the top where you will be rewarded with incredible views of the Andes (including Aconcagua, the highest mountain outside of the Himalayas) on one side and the Pacific Ocean on the other. Quite spectacular.
Take 2-3 litres of water, some snacks, and get there early - 9am at the latest to ensure you're first to the top. Around 8.30am the ranger will turn up and sign you in. You cannot start the climb after 10am.
Sector Granizo just past Olmue, 45 minutes drive from Valparaiso
More info and photos: corrugatedcity.blogspot.com/2008/04/cerro-la-campana-ii.html and corrugatedcity.blogspot.com/2008/04/cerro-la-campana.html
Send your feedback or queries to been.there@guardian.co.uk
Search Been there
Your tips about Valparaiso