Google Earth is an application you download to your computer. It is a 3D map. You enter a location and it flies you to it. There are some 3D buildings you can view, pictures of locations, roads and boundaries. There are different layers that can be turned on to view lodging and restaurants in the area you investigating. It is a great tool to use when studying places that your students may never get to visit.
Tour Builder can be accessses at tourbuilder.withgoolge.com. It works with your current Google account. You add places to visit and write a summary describing the place. You can customize the pin and path colors. Pictures and videos can be inserted into each slide. The tour creates a slide for each stop very similar to Google Slides.