One of the most amazing places I have stayed, and would stay again in an instant, is the Pacuare Eco Lodge in Costa Rica... I stayed in the above cabana high in the rain forest canopy above the ground. The cabana has its own private bridge and hot tub.... You can walk out on the bridge and see monkeys and toucans and feel like you are atop the trees.
The lodge sits on the Pacuare River and is only a few hours from capital city San Jose. You can raft the river and take treks up to Cabecar Indian villages. The whole property is run on renewable energy via solar, wind and water turbine power.
The staff is great, huge community area for dinner/breakfast and drinks.... There are a many different size cabanas and shared hammock areas... Each cabana feels like it is your private rain forest high in the canopy...
Yes, there is a honeymoon suite too!! http://www.pacuarelodge.com/