Pink We flew into Liberia airport (nicer area than San Jose) and hotel was on Pacific Coast. Pacific Coast is where most of hotels are based and more developed for tourism though still largely rainforest / wildlife volcanoes etc.
We did one day at hotel, one day tour you can do whatever you prefer. Hotel AI including kayaks, windsurfing, SUP and flights with TUI was £6,300 for 4 of us for 2 weeks in August. At hotel there's a pool, beach, rainforest, entertainment at night, kayaks, SUP and windsurfing. There are activities like beach volleyball but they are quite low key. At hotel food was amazing, entertainment was OK, beach more an activity beach - not sunbathing but we don't do that - some volcanic ash on beach. Rainforest sounds hotel so lots of wildlife around - we used to eat at their steakhouse every night which is included in AI and waiter service, massive steaks - about 16oz even for 10 year old child. 5 raccoons would visit there a lot as they liked steak - this seemed to send many of the US tourists screaming and climbing on chairs but we loved them and they are quite timid creatures. Was a family with 3 babies. Also saw coati, gecko and pelican there and if you walk down beach there are monkeys in trees.
The hotel is on the lively side so not for anyone after a quiet break, its a mix between families and party people. Lovely hotel and facilities and food and would go back as good value and loved wildlife but were some drinking games going on - could avoid these. We did 5 excursions out - about 6 tour operators are in hotel and there's also a local company GeckoTico Tours on the beach. Trips are roughly £100 per person but full on activities - with TUI its a coach of 50 people, when we went with Nexus it was 10 people, with GeckoTico it was just us 4. GeckoTico was the best. There's about 20 tours, a lot are going to places 2 hours away, a few to places 4 hours away.
Next door to hotel is Diamante - that has a 60mph zipline from several hundred metres in the air going down to the ocean and a wildlife park. The wildlife we had all seen in the wild but my 10 and 11 year old both loved that zipline. Trip we did with GeckoTico Tours just 4 of us was to see sloths in rainforest on Caribbean coast, that was amazing, about 2 hours each way. Another trip through Nexus was Blue River, seeing botantical gardens and rainforest and waterfalls. Through TUI we did Buena Vista (2 hours away) though would go via GeckoTico - this was a waterslide through jungle then ziplining through jungle (about 30 metres in air so same height as trees and saw monkeys and toucan there), then horseriding then hot springs - excellent. Did Arenal with TUI to see volcano and hot springs - great and got history etc but 4 hours each way was a bit far for kids though good scenery on way.
You can also hire a car though coach drove through a few rivers and no signposts in a lot of places and some dirt tracks / herds of farm animals in middle of road so we were advised against. Not many people anywhere we went - tended to just be who was on tour, Buena Vista a few tours. Weather was around 27C though some rainstorms after 4pm as rainy season - we loved those though seeing rainforest with lots of rain. Would strongly recommend. Think with 5 tours we spend about £8,300 in 2 weeks for hotel, flights, all food and drink, all activities and one of best holidays we have had.