What's your favourite KR environment?

For, me Kingdom Rush was always more than just towers and strategy. The series' trademark is its unique design. KR has a ton of different thematic environments. Each game's campaign has 3 distinct level groups that share the same visuals, music, aesthetics, level design, set of enemies and mechanics. Elite stages mostly belong to existing environments, but sometimes have entirely new ones.

The list of environments may look like this (I haven't played Alliance yet):

Plains (KR1)

Mountains (KR1)

Wastes (KR1 + Rotten Forest, Fungal Forest)

Desert (KRF)

Jungle (KRF)

Underground/Saurian (KRF)

Beach (KRF Rising Tides)

Haunted Wastes (KR1 Curse of Castle Blackburn & KRF Shadowmoon)

Woodland (KRO + Hulking Rage, I guess)

Enchanted Forest (KRO)

Ruins/First Elven City (KRO)

Dwarf Caves (KRO)

Wastes/Haunted Wastes (KRV, feels a bit different from KR1)

Dwarven Kingdom (KRV)

Frozen North (KRV)

Kingdom of Linirea (KRV)

Anurian Wetlands (KRV Subaquatic Menace)

Oriental Plains (KRV Rise of the Dragon)

Haven't played Primal Ravage, Hammerhold or Pirate Kings DLCs either, but would love to hear your opinions on them.

What do you think is the best one? Which one has the best design? Best atmosphere? Better levels? Which one is more fun for you? Which one is the best overall?

My personal favourite is First Elven City from Origins. The atmosphere, design and music are perfect, and I love the level design, difficulty and enemy variety. 2nd close is Rising Tides, it's just peak KR.