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

This basement museum explores the art and artistry of fascism.

A former plague hospital turned medical museum.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Amsterdam's former hotspot for public executions and dissections.

The largest collection of handbags in the world, the oldest of which were used to carry Bibles, primarily by men.

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

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

The underground sanctuary of a mysterious ancient cult.

A very classy 1920s-era bar right in Grand Central Station.

Elevated freight railway turned wildly successful urban park.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.