▁and ▁B iss one , ▁in ▁order ▁to ▁carry ▁a ▁road ▁across ▁the ▁lake ▁and ▁provide ▁a ▁direct ▁connection ▁between ▁L ug ano ▁and ▁Chi asso . ▁Today ▁the ▁cause way ▁also ▁car ries ▁the ▁Got th ard ▁railway ▁and ▁the ▁A 2 ▁motor way . ▁ ▁Geography ▁ ▁The ▁lake ▁is ▁ ▁in ▁size , ▁ 6 3 % ▁of ▁which ▁is ▁in ▁Switzerland ▁and ▁ 3 7 % ▁in ▁Italy , ▁has ▁an ▁average ▁width ▁of ▁roughly ▁, ▁a ▁maximum ▁depth ▁of ▁ ▁found ▁in ▁the ▁northern ▁bas in . ▁The ▁cul min ating ▁point ▁of ▁the ▁lake ' s ▁d rain age ▁bas in ▁is ▁the ▁P iz zo ▁di ▁G ino ▁sum mit ▁in ▁the ▁L ug ano ▁Pre al ps ▁( ). ▁Bath ing ▁in ▁the ▁lake ▁is ▁allowed ▁at ▁any ▁of ▁the ▁ 5 0 ▁or ▁so ▁bath ing ▁establish ments ▁located ▁along ▁the ▁Swiss ▁sh ores . ▁ ▁The ▁Italian ▁exc lave ▁of ▁Camp ione ▁d ' Italia ▁and ▁parts ▁of ▁the ▁waters ▁of ▁the ▁lake ▁are ▁considered ▁by ▁European ▁Custom s ▁Law ▁as ▁non - ter rit orial ▁for ▁fis cal ▁purposes ▁and ▁as ▁such ▁enjoy ▁a ▁special ▁tax ▁status ▁as ▁a ▁duty - free ▁area , ▁exem ption ▁from ▁EU ▁V AT ▁ ▁and ▁offer ▁residents ▁other ▁advantage ous ▁tax ▁privileges . ▁ ▁The ▁Mel ide ▁cause way ▁separ ates ▁the ▁northern ▁() ▁and ▁southern ▁() ▁bas ins , ▁although ▁a ▁bridge ▁in ▁the ▁cause way ▁perm its ▁water ▁flow ▁and ▁navigation . ▁The