The mosaic floor of a 4th-century synagogue features a pagan zodiac wheel alongside traditional images of a Torah ark and menorahs.

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

A geometric jumble of homes.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

This subterranean funicular is one of the world's smallest subways.

This unassuming oasis elevated just above the busy streets of Jerusalem offers one of the best views of the Old City.

A 2,000-year-old wine press hidden in an overlooked park in Tel Aviv.

You can row a boat through this ancient underground reservoir.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

This massive underground salt mine now holds a sci-fi theme park in its depths.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This snug medieval lane is one of the narrowest streets in the world.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

A Hungarian optometrist's charming collection of Asian art and curiosities.

A diminutive statue that was inspired by the sculptor's own daughter.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

The true meaning behind this sculpture remains unknown.

On Gellért Hill, this statue depicts the tragic tale of lovers divided by the Danube.

This building has survived for more than a century and remains virtually untouched.

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

Late at night, the bust of the "Dracula" actor was snuck onto the facade of this Budapest castle.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.