Columbia subject headings:
Harvard subject headings:
Balneology--Panama--Caldera.
Caldera (Panama)--Description and travel.
Ecotourism--Panama--Caldera.
Health resorts--Panama--Caldera.
Mineral waters--Panama--Caldera.
Springs--Panama--Caldera.
Tourism--Panama--Caldera.
Princeton subject headings:
Balneology--Panama--Caldera.
Baths--Panama--Caldera.
Caldera (Panama)--Description and travel.
Ecotourism--Panama--Caldera.
Springs--Panama--Caldera.