Love this! (But the UK one should be the Giant's Causeway, not the underwhelming White Cliffs of Dover.)

I NEED a stamp with the Viñales valley national park, and another national protected areas! I mean, Cuba has very few stamps, and those would be a perfect addition!

I like this idea. I would propose my country's national park stamp set but this is better, because other users could say - I want Hungarian set, look a Slovak set already exists, and then there'd be an overload of national parks - or more likely an overload of sad users.

Slovakia - Slovenský raj - Slovak Paradise, secondary Vysoké Tatry - High Tatras. But HT is just another alpine mountain range, while SR is a unique and dramatic canyonlands with waterfalls and stuff. look it up.

Czechia - Pravčická brána - Pravcice gate - is a rock arch in Czech-Saxon Switzerland mountain range. Other candidates - Krkonoše NP, Šumava NP...

same request https://feedback.slowly.app/stamp-requests/p/worlds-national-parks

Australia https://feedback.slowly.app/stamp-requests/p/australia-great-barrier-reef-or-uluru

China https://feedback.slowly.app/stamp-requests/p/zhangjiajie-national-forest-park

Liberia https://feedback.slowly.app/stamp-requests/p/liberia-sapo-national-park-location-stamp

Malaysia https://feedback.slowly.app/stamp-requests/p/malaysia-mount-kinabalu

Everest https://feedback.slowly.app/stamp-requests/p/highest-mountains-of-each-continent

South Sudan https://feedback.slowly.app/stamp-requests/p/south-sudan-topi-of-boma-national-park

I offered to replace topi with a White-Eared Kob

Tajikistan https://feedback.slowly.app/stamp-requests/p/tajikistan-tajik-national-park-pamir-mountains-location-stamp

Kilimanjaro https://feedback.slowly.app/stamp-requests/p/highest-mountains-of-each-continent

Turkey https://feedback.slowly.app/stamp-requests/p/turkey-pamukkale-and-hierapolis-national-park

US https://feedback.slowly.app/stamp-requests/p/united-states-national-parks-v1

Vietname https://feedback.slowly.app/stamp-requests/p/vietnam-ha-long-bay

Zambia https://feedback.slowly.app/stamp-requests/p/zambia-victoria-falls

Malawi https://feedback.slowly.app/stamp-requests/p/malawi-lake-malawi-national-park

Congo https://feedback.slowly.app/stamp-requests/p/congo-the-conkouati-douli-national-park

Guinea https://feedback.slowly.app/stamp-requests/p/guinea-mount-nimba-strict-nature-reserve-location-stamp

Dominica https://feedback.slowly.app/stamp-requests/p/dominica

US another https://feedback.slowly.app/stamp-requests/p/united-states-yellowstone-national-park

Venezuela https://feedback.slowly.app/stamp-requests/p/venezuela-national-park

Azerbaijan https://feedback.slowly.app/stamp-requests/p/caucasus-shahdag-one-of-the-most-beautiful-places-in-the-caucasus-it-is-located

Norway https://feedback.slowly.app/stamp-requests/p/norway-galdhopiggen

Germany https://feedback.slowly.app/stamp-requests/p/germany-the-bastei-bridge

Kenya https://feedback.slowly.app/stamp-requests/p/tanzania-the-mara

Mongolia https://feedback.slowly.app/stamp-requests/p/mongolian-location-based-stamps

Argentina https://feedback.slowly.app/stamp-requests/p/argentina-glaciar-perito-moreno

Puerto Rico (the separate country in slowly) https://feedback.slowly.app/stamp-requests/p/puerto-rico-el-yunque-national-forest

Niagara falls is local stamp

Galápagos Islands were presented by Lonesome George

Mt. Fuji depicted on the festival stamp

For Romania I'd suggest the Danube Delta with its waterlily reservation which is the biggest in Europe.