An abandoned saucer-shaped monument in the Bulgarian mountains.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

Flamboyant architecture from the turn of 20th century.

Riga’s historic porcelain industry is preserved in this small, hidden museum.

Once one of Riga’s historically important cemeteries, this location is now a quiet park.

The European Union’s tallest freestanding structure provides radio and television broadcasting to half of Latvia.

Glowing orb in Minsk houses 8,600,000 items.

A system of constructed rapids and concrete waterfalls in a linear park on the Slepnya River.

A beautiful and moving memorial set on a little island in the middle of the river in Minsk.

This Minsk museum has cat coffee, cat chess, cat art, and even a cat "staff," which visitors are free to take home.

A sculpture of graceful storks sits atop this fountain in Independence Square.

This Ukranian fortress is one of the best-preserved medieval castles in Europe.

Elaborate mansions built by Roma residents in Soroca to show their success after centuries of discrimination.

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Featured in one of the most iconic scenes in cinema history.

The largest catacomb system in the world.

Built in the Soviet era, this cableway system still runs gondolas from Odessa down to Otrada Beach.

Last remaining nuclear missile base in Ukraine.

Etched into a dry lake bed, this massive directional indicator is accurate without magnets.

A black and white painted wall creates an optical illusion in the California desert.

The liveliest ghost town in the state.

Exotic feline breeding compound and conservation center.

At the western edge of Palm Springs, a rugged desert canyon trail leads to a waterfall at the base of the San Jacinto Mountains.