Today it is possible to walk through the old agora (marketplace) and stroll along Roman roads.
( Today ( it ( ( is ( possible ( to ( ( ( walk ( through ( ( the ( old agora ) ) ( -LRB- ( marketplace -RRB- ) ) ) ) ) and ) ( ( stroll along ) ( Roman roads ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NN Today)) (NP (PRP it)) (VP (VBZ is) (ADJP (JJ possible) (S (VP (TO to) (VP (VP (VB walk) (PP (IN through) (NP (NP (DT the) (JJ old) (NN agora)) (PRN (-LRB- -LRB-) (NP (NN marketplace)) (-RRB- -RRB-))))) (CC and) (VP (VB stroll) (PRT (RP along)) (NP (JJ Roman) (NNS roads)))))))) (. .)))
Walking through the old agora is a popular pastime. 
( ( Walking ( through ( the ( old agora ) ) ) ) ( ( is ( a ( popular pastime ) ) ) . ) )
(ROOT (S (NP (NP (VBG Walking)) (PP (IN through) (NP (DT the) (JJ old) (NN agora)))) (VP (VBZ is) (NP (DT a) (JJ popular) (NN pastime))) (. .)))