Summer's Hot Spot For The Stars: Spain ... Bienvenida!

Fuel up the jet, 'cuz TMZ is taking you to one of summer's hottest spots for the stars ... Hollywood's high-tailing it out of the L.A. bubble and vacaying their lavish lives away in ... SPAIN!

Kylie Jenner kept it cool and casual sippin' Spain's finest wine during sunset hour, Alix Earle brought the Miami heat in her red-hot bikini, and couples, Deshaun Watson and Jilly Anais and Teresa Giudice and Louie Ruelas turned up the PDA meters!

Kendall Jenner was on the same Spain wavelength as her younger sis Kylie -- lounging in a chair with the backdrop doin' all the talking!

And age is just a number, just take it from this Eva Longoria bikini pic ... The 50-year-old OWNING this black bikini!