St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A long-buried ancient ruin unearthed right in the middle of the city.

This church also serves as a lighthouse complete with a beacon.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Enormous sandstone towers loom within a Czech forest.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

Op-art architecture designed for happiness.

A massive tribute to Estonian history and culture.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

This atmospheric spot in Pärnu's historic old town is located in a 17th-century almshouse.

A historic scientific breakthrough that crosses nine borders.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

The oldest continuously operating pharmacy in Europe.

Once standing on solid ground, this slender beacon is a victim of the very shoreline it was charged with announcing.

Spend your honeymoon where the Devil had his wedding.

Estonia's largest creative city is a vibrant bohemian hub located within a former industrial complex.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

Mysterious craters may have been home to an ancient cult.

This controversial monument was designed to lionize the Red Army, but also disheartened the Latvian people.

One of the best-preserved wooden manor houses in Latvia, decorated with painted interior walls.

The Latvian city of Ventspils is filled with dozens of cow statues showcasing unique themes.