Zagreb, Croatia
Grič Tunnel
A World War II evacuation tunnel turned into a history display of Croatian state and people.
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Zagreb, Croatia
A World War II evacuation tunnel turned into a history display of Croatian state and people.
Kustići, Croatia
Just a few miles from Novalja, a strange geological oddity has left scientists baffled.
Zagreb, Croatia
This 135-year-old weather station studied the effects of the climate on human health.
Trsteno, Croatia
The oldest arboretum on the Dalmatian coast doubles as the gardens of Kings Landing in "Game of Thrones."
Redstone, Colorado
This Rocky Mountain mansion was the luxurious home of the authoritarian leader of a company town.
Aguilar, Colorado
A short tunnel built straight through a magmatic dike.
Leadville, Colorado
This 19th-century house museum features a horse-drawn hearse and other antique oddities.
Lakewood, Colorado
An artist-run shop filled with art inspired by and made from nature.
Boulder, Colorado
This unassuming building houses one of the world's most extensive collections of cars created by automotive legend Carroll Shelby.
Silver Plume, Colorado
The remnants of a 1970 plane crash remain high in the Rocky Mountains.
Ouray, Colorado
A glimpse of a waterfall is reached by a steel catwalk along a slot canyon located in an Ouray city park.
Westcliffe, Colorado
Located in the world's highest-altitude Dark Sky Community, this observatory welcomes amateur and professional astronomers alike.
Zrenj, Croatia
Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.
Jasenovac, Croatia
Croatia's towering concrete blossom grows from the site of a World War II concentration camp.
Pula, Croatia
One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.
Malinska, Croatia
This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.
Split, Croatia
A wonderfully strange collection of 500+ stuffed frogs doing people things.
Komiža, Croatia
An ethereal glowing blue ocean cave in Croatia.
Dubrovnik, Croatia
The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'
Brno, Czechia
Mummified monks and the accidentally interred, in a 17th-century crypt.
Žibřidice, Czechia
Abandoned substation turned village treasure.
Liberec, Czechia
This unusually shaped mountaintop tower looks like a UFO floating over the city.
Vysoký Újezd, Czechia
This former quarry is now a picturesque gorge that hides a sunken lake.
Dolní Morava, Czechia
The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.