This striking structure is the Socialist-modernist centerpiece of a former Soviet spa resort.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

Built as part of a "sludge fleet" that transported sewage, this historic steamship now mostly moves people.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This restaurant's specialty is "a major enigma for food historians."

The designer of this railway tunnel added a birthday present for himself.

Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Music boxes like you've never imagined.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

English parliaments were once convened by this ancient oak tree in the heart of Sherwood Forest.

Would you dare to dangle from a great height in a wooden basket?

The (usually) serene burial place of the world's most notorious drug lord.

A memorial to American oil drillers who volunteered to travel secretly to England in 1943 and work in the U.K.'s only oil field.

A hollow cement depiction of time's inexorable effect on the human body.