....they can get along very well, here are 3 integration options order by ascendind level of difficulty:

1) link and matching interface: you can edit TouristWay's templates to modify their look until the match perfectly the design of your main website. Then all you will have to do is creating links to your customized TouristWay anytime you need booking features in your main site. To make the experience seamless you can assign your TouristWay an hostname in your domain, like booking.yourdomain.com

Read here about template customizations: http://support.touristway.com/forums/30687/entries/21760

2) white label box: you can remove any unwonted content or graphic element and change colors and layout to create a tidy and anonymous interface that can fit anywhere in your website, then using AJAX (or old-style IFRAMEs) you can easily embed it in your pages. Ajax requires a little more expertise but result is really slick. Find here an easy example: http://support.touristway.com/forums/4369/entries/58989

3) XML over HTTP: if you are a developer you can use TouristWay's API to programmatically control TouristWay's component and get their output data in XML format. Read more about the API here: http://support.touristway.com/forums/4369/entries/32806

You can combine API, templates and components to create the perfect solution, take some time to read the rest of the documents at http://support.touristway.com/forums