A beautiful art space and unusual mini-hotel hidden in the city center of Dnipro.

A century-old church is now a space museum with a treasure trove of Soviet space items.

Last remaining nuclear missile base in Ukraine.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

The deepest metro station in the world.

A subterranean Holocaust refuge within one of the world's longest cave systems.

The watery grave of an impractical idea.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

A beautiful maze marks where three countries meet.

The deepest hole drilled in the name of science, where evidence of Precambrian life was found.

A beautiful Arctic museum and nature center preserves the culture of the Sámi people.

This cairn marks the only place where Central European Time, Eastern European Time, and Further-eastern European Time meet.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

A reproduction of earth's many biomes.

A rare view of a preserved Victorian science museum.

This former stomping grounds of the most eminent astronomers of the early 20th century.

A bronze monument to the infamous radio broadcast in the real New Jersey town where the fictional Martians crash-landed.

An unrealized dream to wirelessly electrify the entire Earth.

Fossils, railroads, and waterfalls!

One of Canada's oldest museums, the beautiful Redpath has been serving up Natural History and Ethnography since 1882.

Home to Hollywood history and a very special salt crystal.

World's only nuclear reactor operated by liberal arts undergraduates.