This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

The world's only museum devoted to the wonders of fluorescence.

The only known mosaic depicting the Greek god of sleep, Hypnos.

A tiny church on a man-made island in the Adriatic.

A curious cave church carved into the face of a cliff.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This 13th century Orthodox monastery is built right into the Moldovan cliffside.

An extensive collection of some of the oldest grave markers in Lithuania.

The first museum dedicated to exploring humanity's cultural relationship with the celestial world.

You would never guess that before World War II this lonely field was a bustling German city.

Over time, this castle grew to encompass the entire island.

A tiny traditional village keeps an ancient method of beekeeping alive.

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

Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

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

Ancient mysterious ruts carved in the bedrock.

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

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

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

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

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