Banff National Park (Canada)
Mount Assiniboine Provincial Park (Canada)
Parque Nacional Torres del Paine (Chile) (W-Trek)
La Ruta de Pedra en Sec (Mallorca, Spain)
Causeway Coastal Route (Ireland)
Wild Atlantic Way (Ireland)
Mljet, Plitvicer Lake National Park, Velebit Mountains and Krka National Park (Croatia)
Bealach na Bà (Scotland)
Mt. Hood National Forest (Oregon, USA)
Kilimadscharo (Tansania)
Salkantay Trail (Peru)
Cascades du Hérisson (France)
Valensole Plateau (France)
Pouakai-circuit (New Zealand)
Routeburn Track (New Zealand)
Pieniny Nationalpark (Poland/Slovakia)
Gaztelugatxe (Spain)
Santorini (Greece)
.
.
.
and a lot more :-D
Things I'd like to do in the future in no particular order:
Kite surfing
Diving license
(Co-)Driving a lap in the green hell
Things I've done:
Wind surfing license
Bungee jumping
Sky diving
Wake boarding
Snow boarding
Skiing
Hot air ballooning
Downhill mountain biking Harz (here)