There aren't many, but "Lost Girl" is definitely one of the best. Definitely not for the kiddies, but there's plenty to like about its reuse of various mythologies. And who can't like the Bo/Kensi double act?
Others include the 1960s Twilight Zone, Outer Limits, and The Smurfs.
I don't know if I've watched a lot of fantasy series. Maybe Doctor Who, which features a phone box time machine and a screw driver that does scans?
Actually I do sometimes get the whole sci fi and fantasy concepts a little confused.
Would Stranger Things be considered a fantasy series? That has a lot of fantastical elements, like upside downs and monsters.
The original Doctor Who show was made back when police boxes were real items used by the English police force. The ship was said to materialize and blend into its environment. To save on costs, the thing broke down so it was stuck in the shape of a police box. The show, a few years later, created had a sonic screwdriver that only used sound vibrations to remove screws, open tumbler-based locks, detonate mines from a safe distance away (via the vibrations), and other
simple things. It became overused in the 1970s, but few times did it go beyond the initially intended function... the problem started with the 1969 story "The War Games" as the screwdriver was used to reverse a
localized section of wall panels held together by a magnetic field...
...then the 2005 revival came along and the collective IQ of the audience dropped 50 points as a result of the revival of the thing as a mindless magic wand that can do everything. It's a cheat. Wish it was never invented...
Regeneration, as the show presents it, is pure fantasy, but in nature there are some species that can regenerate organs or even change genders (very rare) without the need of hormone treatments or artificial surgeries.
Containers whose insides are larger on the inside = transdmensional engineering. Like teleportation, it's pretty much limited to fantasy.
Sci-fi = fictional environment but uses real science to some extent, and/or sets up rules the story must adhere to. Even fantasy devices (e.g. warp drive) are given some level of schematics to feel plausible.
Fantasy = anything can happen within the universe being told, ignoring the laws of physics and science altogether. Rules can apply, but they're not followed as stringently - or at all.
Sci-fi/fantasy is a blend of fantasy, mixed with sci-fi elements (and real science, to help bridge a sense of the familiar with the unknown or impossible (suspension of disbelief)) and is pretty much a ubiquitous, de facto standard.