A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.

This tiny little cave was said to have been a refuge for a saint with a glowing arm.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

A small monument in Lithuania marks the geographic center of Europe—or at least one of the claimants.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

What might be the oldest living tree in London has survived fires, bombings, and estate agents.

This iconic high-rise residential block was one of the last to be built in the Brutalist style.

The world’s largest magazine collection was born from a single shelf in a teen’s bedroom.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

This hidden green space is the city's second largest conservatory.

The remains of Crystal Palace Great Exhibition of 1851.

A sculpture for the sun and stars, created by Nancy Holt.

An eerie, derelict amusement park in Berlin.