Divers can explore the deeps but you can also snorkel here, or take a glass-bottom boat or submarine tour to get a glimpse of this watery world.
( ( ( ( Divers ( can ( explore ( the deeps ) ) ) ) but ) ( you ( ( can also ) ( ( ( ( snorkel here ) , ) or ) ( ( take ( a ( glass-bottom ( boat ( or ( submarine tour ) ) ) ) ) ) ( to ( get ( ( a glimpse ) ( of ( this ( watery world ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Divers)) (VP (MD can) (VP (VB explore) (NP (DT the) (NNS deeps))))) (CC but) (S (NP (PRP you)) (VP (MD can) (ADVP (RB also)) (VP (VP (VB snorkel) (ADVP (RB here))) (, ,) (CC or) (VP (VB take) (NP (DT a) (JJ glass-bottom) (NN boat) (CC or) (NN submarine) (NN tour)) (S (VP (TO to) (VP (VB get) (NP (NP (DT a) (NN glimpse)) (PP (IN of) (NP (DT this) (JJ watery) (NN world))))))))))) (. .)))
Glass-bottomed boat tours cost a lot more than snorkeling.  
( ( Glass-bottomed ( boat tours ) ) ( ( ( cost ( a lot ) ) ( more ( than snorkeling ) ) ) . ) )
(ROOT (S (NP (JJ Glass-bottomed) (NN boat) (NNS tours)) (VP (VBD cost) (NP (DT a) (NN lot)) (NP (QP (JJR more) (IN than) (CD snorkeling)))) (. .)))