Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

A Swedish town came up with an out-of-the-box way to eliminate the bloodthirsty insects.

His body was found mysteriously preserved in a Swedish mine over 40 years after his initial disappearance.

A historic scientific breakthrough that crosses nine borders.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

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

These enlarged egg sculptures represent the native birds of eastern Iceland.

Over 400,000 birds spend their summers nesting on this small Arctic island.

The remote graves mark the mysterious deaths of four 19th century explorers.

A young Italian couple has been locked in an embrace for over 6,000 years.

A mesmerizing landscape of 18th-century cellars carved out of the land.

The lab where the scientist made his groundbreaking discoveries is preserved on the basement floor of the Faraday Museum.

A little-known sculpture park of contemporary environmental art in a Lapland forest.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

This beautiful site is where the first transatlantic telegraph was sent from.

This truly palatial work of Communist-era architecture now sits crumbling on a Croatian beach.

The last inhabitants of one of the U.K.'s most remote islands were evacuated in 1930.

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

This abandoned oil depot produces world's longest echo in a manmade structure.

This doorless 20th-century elevator doesn't stop or slow down.

This Croatian computer club features such gaming relics as the infamous Virtual Boy and an 8-bit Pacman machine.