Places Vrielinkie Wants to Go

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Dynastic Home of the De Piro Family.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

Ancient mysterious ruts carved in the bedrock.

This unique building in the main square stands out among the city's typically Baroque architecture.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

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

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

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.

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

This subterranean necropolis holds three floors of antler-dug grave caves.

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

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A nomadic museum known for its art exhibitions about religion and faith.

A public urinal so pretty, it was declared a national monument.

Seven mini rowhouses fill the gap between 54 and 70 Westerstraat.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.