People have been swimming in pools since the Romans began back in the 1st century B.C. A lot has changed in the world since then, and you won’t believe these incredibly beautiful swimming pools that exist around the world. Our personal favorite is #19.

1. Blue Lagoon Geothermal Resort (Grindavík, Iceland)

2. The Hotel Caruso (Amalfi Coast, Italy)

3. The Oberoi Udaivilas (Udaipur, India)

4. Reethi Rah One and Only Resort (Maldives)

5. Sanctuary Swala (Tanzania, Africa)

6. Nandana Villas (Bahamas)

7. The Skye (São Paolo, Brazil)

8. Katikies (Santorini, Greece)

9. Giola Lagoon (Thassos, Greece)

10. Boucan by Hotel Chocolat (St. Lucia)

11. Chongwe River House (Zambia, Africa)

12. Marina Bay Sands (Singapore)

13. St. Regis (Lhasa, Tibet)

14. Hanging Gardens Ubud Hotel (Bali, Indonesia)

15. The Sarojin (Phang Nga, Thailand)

16. Biras Creek (Virgin Gorda, British Virgin Islands)

17. Purobeach Porto Montenegro (Montenegro)

18. LeCrans Hotel and Spa (Crans Montana, Switzerland)

19. The Library (Koh Samui, Thailand)

20. San Alfonso del Mar Seawater Pool (Algarrobo, Chile)

21. The Cambrian (Adelboden, Switzerland)

22. Velassaru Resort (Maldives)

23. Hearst Castle (San Simeon, California)