Property Location A stay at Observatory Guesthouse - Adults Only places you in the heart of Busselton, within a 10-minute walk of Busselton Jetty and Geographe Bay. This 4-star guesthouse is 21.6 mi (34.8 km) from Yallingup Beach and 22.3 mi (35.9 km) from Bunker Bay.Rooms Make yourself at home in ...