SloveniaiFrom Wikivoyage, the free travel guide, and Wikipedia. We have not been yet.
Cities
Ljubljana
The picturesque capital
Wikipedia · Open in Maps · Photo Andrew Milligan Sumo, CC BY 2.0 · text Wikivoyage, CC BY-SA
Bled
A romantic mountain lake complete with its own castle and island
Wikipedia · Open in Maps · Photo Canadianhockey91, CC BY-SA 3.0 · text Wikivoyage, CC BY-SA
Celje
One of Slovenia's oldest cities
Wikipedia · Open in Maps · Photo Reisevogel, CC BY-SA 4.0 · text Wikivoyage, CC BY-SA
Koper/Capodistria
A lovely Venetian city, largest on Slovenian coastline
Wikipedia · Open in Maps · Photo TICKoper, CC BY-SA 4.0 · text Wikivoyage, CC BY-SA
Maribor
Slovenia's second largest city
Wikipedia · Open in Maps · Photo Vlada Republike Slovenije, Public domain · text Wikivoyage, CC BY-SA
Nova Gorica
The city on the border with Italy
Wikipedia · Open in Maps · Photo Eleassar, CC BY-SA 4.0 · text Wikivoyage, CC BY-SA
Piran/Pirano
A gorgeous Venetian port
Wikipedia · Open in Maps · Photo Etienne O. Dallaire, CC BY 4.0 · text Wikivoyage, CC BY-SA
Postojna
The site of the gigantic Postojna caves
Wikipedia · Open in Maps · Photo Tiia Monto, CC BY-SA 3.0 · text Wikivoyage, CC BY-SA
Ptuj
One of Slovenia's oldest cities
Wikipedia · Open in Maps · Photo Ptuj-mestnaHisa1.JPG: Sl-Ziga uploaded and derivative work: MrPanyGoff, Public domain · text Wikivoyage, CC BY-SA
Other destinations
Škocjan Caves
Less commercial than Postojna but similarly impressive, a UNESCO World Heritage Site.
Wikipedia · Open in Maps · Photo Lander at Slovenian Wikipedia, CC BY-SA 3.0 · text Wikivoyage, CC BY-SA
Soča Valley
Soča river, with its emerald colour, is one of the most beautiful European Alpine rivers.
Wikipedia · Open in Maps · Photo Florian Jesse, CC0 · text Wikivoyage, CC BY-SA