Show the description and code of the attraction type most tourist attractions belong to.
create table ref_attraction_types (attraction_type_description varchar, attraction_type_code varchar, PRIMARY KEY (attraction_type_description)); create table tourist_attractions (attraction_type_code varchar, PRIMARY KEY (attraction_type_code))
select t1.attraction_type_description, t2.attraction_type_code from ref_attraction_types as t1 join tourist_attractions as t2 on t1.attraction_type_code = t2.attraction_type_code group by t2.attraction_type_code order by count(*) desc limit 1