#12 Expect 8-9 hours of walking from parking lot to parking lot on this one. Here is the parking lot: https://www.google.com/maps/preview#!data=!1m4!1m3!1d8119!2d6.6255232!3d60.13411 06!2m1!1e3&fid=7
Marble Caves at General Carrera Lake in Patagonia (Argentina and Chile)
The Marble Caves, known as Marble Chapel and Marble Cathedral, are located at the center of the lake and were formed by waves over the past 6,000 years.
#12 Expect 8-9 hours of walking from parking lot to parking lot on this one. Here is the parking lot: https://www.google.com/maps/preview#!data=!1m4!1m3!1d8119!2d6.6255232!3d60.13411 06!2m1!1e3&fid=7
06!2m1!1e3&fid=7
Hike map: http://ut.no/tur/til-trolltunga