1. Do as the Romans did and visit an opulent Roman bath.
2. Go smart with these high-tech toilets that measure blood pressure, protein count, and more.
Like much, much more. We don't fully understand what all the buttons do.
3. Pee at sea inside this cozy floating bathroom on a tugboat-turned-boathouse:
4. Or maybe you'd prefer a rest-room with a view.
5. Take the safe route and use a bulletproof public toilet in Beijing, China.
6. Then get silly at these wacky urinals at Foreigners Street in Chongqing Municipality, China.
7. Be brave and use "Don't Miss a Sec" in London.
Artist Monica Bonvicini's public toilet is constructed of one-way glass. Anyone inside the toilet can see outside, but passersby see only a mirror.
8. Or step into the gorgeous Cagaloglu Hamam Turkish baths in Istanbul.
These are the last hamam (or baths) to be built in the empire. What's the difference between a Roman bath and a Turkish bath? Roman baths have chairs without Ottomans.
9. Get green and try a solar-powered loo in South Australia.
10. Be blinded by the golden urinals at The Robot Restaurant in Tokyo, Japan.
11. Relax and gaze out the bathroom window at the Amanpuri Resort in Phuket, Thailand.
12. Sit on history and visit the public latrines of Ephesus.
13. Go bottom's up in the restroom at Wat Lahn Khuat (Million Bottle Temple).
14. And finally, visit the "Mark 5" conceptual space toilet in Tokyo, Japan.
OK, so it's not in space. But trust us: Zero gravity presents its own set of challenges you do not want to deal with.