These lesser-known Maltese catacombs date back over 1,700 years.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

A hidden tunnel of bones in one of Malta's oldest churches.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

The world's first invisible city square is an homage to a man who pushed the boundaries of art.

A century-old prison in the heart of Vilnius is now a lively bar, dance club, and artist residency.

A 300-kilogram egg sculpture that embodied a neighborhood revival.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

An abandoned masterpiece of Soviet Brutalist architecture.

Open-air museum with a large collection of Soviet-era statues.

The oldest funicular in Lithuania has been climbing this steep hill since 1931.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

Ever-growing collection of devils in art.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Lithuania's outdoor sculpture trail of wooden folk art.

Things aren't quite what they seem at this mind-bending museum.