The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

An idyllic hotel that gave its name to a supposed shadow government.

A strangely curved lamppost stands tall over this avenue in Rotterdam.

This functional solar system model was inspired by the famous Eisinga Planetarium.

A dramatic art installation features a BMW flying out of a building in Rotterdam.

The largest 19th century panorama in the world still in-situ.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

Two gravestones clasp hands over the religious divide.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

A grassy pyramid named after a French battle.

The world's first interactive human body museum also serves as a chair for a giant orange man.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

A beautiful maze marks where three countries meet.

The history and future of cannabis.

The spectacular history of spectacles on display.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

This cheese shop also houses a museum devoted to Dutch dairy.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.