1. Interactive Tardis
On Google (use keypad arrows instead of clicking to explore inside!)
In the street view of Earl's Court, you'll find the familiar police box. You can explore inside to see that it really is bigger on the inside.
2. Loch Ness Monster
If you search for Loch Ness, the little street view man turns into a loch ness monster. Cute, subtle, and completely unnecessary.
3. Android Pissing on Apple
via Business Insider
Google quickly removed this after its discovery, but the Android mascot pissing on the Apple logo was hidden in Pakistan, presumably put there by a Google employee.
4. Royal Carriage Ride
Public transportation directions between Windsor Castle and Buckingham Palace have the option of traveling via Royal Carriage. Taking the Tube is still going to be your fastest option, though.
5. A Ride on the Loch Ness
If you happen to be traveling from Fort Augstus to Urquhart Castle, the fastest method is on the back of the Loch Ness Monster.
6. Are We There Yet?
If you're looking at directions on Google Map and ask "Are we there yet?" on an Android multiple times, eventually the response will be "If you ask me again, we won't stop for ice cream."
7. Directions to Mordor
This doesn't work on the newest version on Google Maps, but Google used to include a pretty solid LotR reference.
8. The Raddest Method of Transportation
via The Next Web
Although no longer available, "Dragon" used to be a public transportation option between Snowdon and Brecon Beacons.