The ghostly remains of an accidental sea.

Quite simply the largest tree in the world (by volume).

Four hundred granite steps were built into this massive rock by the National Park Service.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Repository for more than 22 million pickled specimens.

Eighty million natural history specimens call this gargantuan museum home.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Catacombs turned marketplace.

This preserved puppy was an adorable beacon of charity.

Used as an example in one of the first dictionary entries for "museum" in 1706.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).

A reportedly haunted 14th-century church is curiously facing the “wrong direction.”

The first peace pagoda to be constructed in the Western world sits next to a small English lake.