There are four moons that orbit Jupiter and one that orbits Saturn that are roughly the size of our own moon, are beautiful, have very unique features, one likely has a subsurface liquid water ocean, two others may too, one has liquid methane lakes (as liquid methane has a very low freezing point), one even has plumes of (most likely) water spewing out of the surface at incredible pressure. It means these are the best bets for the possibility of some extraterrestrial life.
Titan most certainly has some kind of surface liquid (the best guess is something close to methane) meaning it may have a liquid cycle (somewhat like Earth's water cycle) and there is always the possibility of some strange life forming as liquid methane stays a liquid at temperatures well below zero. No one quite has any details per how. But it is a beautiful planet and worth visiting!
This is the most gorgeous moon (or even planet) for me and also the most interesting. It has an extremely smooth surface made of silicate, has a very light oxygen atmosphere, possibly has a liquid water ocean under the crust and there may even be melt layers of water which might explain the beautiful red streaks. Also it shares the name with Europe which is the continent with the most Atheists or non-believers in God, the highest concentration of generous humanistic socialist-governments, very yummy fresh croissants in the morning and, of course, the birth place of the "I'm a barbie girl" song.
Calisto is one of the oldest and is definitely the most cratered object in the solar system. It is rock and ice, possibly has a liquid ocean under the crust (but at 100km from the surface we won't be visiting it any time soon) and also has some particularly beautiful craters with double and triple rings. It is so utterly cratered that it's hard to fine one square km that doesn't show signs of impact. It's also a pretty moon that looks something like a teenagers face after eating too many pizza pockets.
This might be where we hit the jackpot. While it's the least spectacular in colours or features, it is larger than Mercury, has a notable atmosphere and almost certainly has a very large internal ocean. It has water ice all over it's surface (meaning you'll have no problems making mojitos or margaritas). There is an atmosphere that likely contains some oxygen (though you'll still need to wear a helmet if you don't want to become a popsicle in a matter of seconds). All of the moons have a surface temperature well below . There are planned projects to land on Ganymede and bore through the crust to analyse the subsurface water. A couple hitches that delay the European space agency is first no clear idea how they'll bore though the surface and their terrible record at landing things on far away rocks.
We shouldn't expect Io to have any ocean of any kind because there's next to no water anywhere on the planet. It's also highly volcanic meaning a landing would have to be very well executing considering the massive plumes from volcano eruptions and lava flows that cover hundreds of kilometers. I wouldn't quite call it a pretty moon but it is certainly the most beautiful of all moons composed of two vowels and no consonants. It is covered by a lot of frosty sulfur so it's not a place one would go to for a casual picnic.
LRO images from the farside of the Moon came with a lot of hoopla but NASA refuses to release high resolution images appear to have artificial structures in them. They have been sought by FOIA but to no avail. NASA also refuses to comment on the structures. The tower is intriguing. It is 5 to 9 miles high, crystalline and cellular structures. There is one image definitely in the public domain that appears to be a cluster or wheel structures but on a colossal scale. The radar dish also is in the public domain, put the high resolution image has not been released.
"The tower is intriguing. It is 5 to 9 miles high"
Been debunked already.
We are not speaking of the same tower. see my picture in response to Davis Goodman
Michael when you read these fantastical conspiracies...you really ought to check out more than some sketchy websites that list every whacky coockoo story as though they are all possibly true. Not even a fraction of them can be. There are many websites which independently verify these and have extremely high standards of investigation, list their methodology, provide all the data and give a lengthy explanation beyond true or false (maybe, unlikely, possibly true, partly true). It's a major intellectual disability to continuously believe the fantastical without applying serious skepticism and research. This is especially the case with the entire field of theology (disguised as serious study) but is no different with moon towers. I cannot count the amount of conspiracies you've listed here which we've shown are easily debunked. Why is it that you slide towards the tinfoil-hat theories so uncritically?
Davis get your head out of the sand. These images are in the public domain.
Below is the tower. One of the best images I've seen. the structure is 5 to 9 miles high.
Colossal wheel structures:
This video is sensational. But is entertaining and is to be taken with a grain of salt.