Santa Teresa is one of the premier vacation destinations in Costa Rica, and Casa Aria is perfectly located in the middle of Santa Teresa. Santa Teresa is built along one long road that runs parallel to the beach, about 150-200 meters from the beach. Side roads branch off of the main road, and if you turn one direction you go up into the hills, and if you turn the other direction, you drive down to the beach.
Once you get to Santa Teresa, here's how you get to Casa Aria. Turn right at the crossroads, and drive north a little over 1 kilometer. Take the second right after the Green World Organic Market (There is a blue Lanco sign) and drive to the end of the road, continue left and drive up the hill. Casa Aria is the on the right, with a large black gate.
There are several ways to get to Santa Teresa. Depending on whether you drive, take a flight, or shuttle, the travel time will vary.
There are two international airports in Costa Rica. One is Alajuela (SJO) and the other in Liberia (LIR). While LIR is closer to Santa Teresa, flying into SJO will give you more options.