This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

This 135-year-old weather station studied the effects of the climate on human health.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Gargoyle head that brings good luck.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

What happens when you cross a mayor and a painter?

In this town's main square resides a statue of none other than the 43rd President of the United States.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

The romantic garden was the epicenter of the Hungarian art scene in the 1880s.

A 125-meter long "tribute to the Brazilian people."

Oslo's historic toboggan run has been letting thrill seekers slide from train stop to train stop for over a century.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Tens of thousands of tiny bottles stuffed with various items.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

Home to three historic ships from the age of Vikings.

A beautiful bamboo trail tucked in this famous Japanese Shrine.