The "OV Chipkaart" ticket system (similar to London's Oyster) is now mandatory in Amsterdam for trams, the metro and city buses. Unfortunately the handy "strippenkaart" strip tickets are no longer valid in Amsterdam.
Useful explanation (in English) of the OV chipkaart at:
www.amsterdamtips.com/tips/ov-chipkaart.php
Staggeringly cheap way of getting round - $15 for 7 full days - even timed. Connections between buses/subway excellent. Get into Boston/Cambridge for a few dollars from the airport. Machine at the airport.
All subway stations
This has to be the best and cheapest way to travel around Japan, providing you go everywhere. It has to be purchased outside of Japan and then the invoice is exchanged for a pass at one of the stations (maybe the airport I can't quite remember). You cannot buy it within Japan as it is only for tourists.
The pass works on all national and local trains using the JR lines.
Don't forget to flash the pass as you walk pass the station guards.
I recommend you download the timetables too.
Quite the best way of travelling in Hong Kong and the many outlying islands is on the brilliant integrated transport system. The electronic Octopus card will save you both time and money, not least of all on the express in from the airport.
Unlike London airports where transport for London offers no prominent advice to those visiting the UK, The Octopus card is comprehensively trailed at a dedicated desk at the airport.
A four-day bus pass costs £21 - you can hop on and off buses over a wide area, walk from one valley and come down in another and generally avoid driving and finding parking spaces! The open top bus along Borrowdale is great fun!
This is a blue multi-strip ticket which can be used on trams, metros and buses in Amsterdam and all over Holland. Works out about half the price of buying a ticket on board.
See www.gvb.nl (Amsterdam Transport organisation, mainly in Dutch)
Good English explanation of the Strippenkaart at
www.amsterdamtips.com/getting-around-amsterdam-the-strippenkaart.php
Depending on the type of card purchased, this pass includes admission to three, five or seven New York attractions and can save you a great deal over purchasing the attractions individually. Most major attractions are included in the card.
The Go Boston Card is the perfect pass if you want to visit a lot of Boston attractions. The card can be purchased for 1, 2, 3, 5, and 7 day increments. Once you have purchased the card you have the choice of visiting every attraction you can think of in Boston and surrounding areas.