The world's smallest Austen museum is inside an unassuming phone booth.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

A faded reminder of what was once a common sight in London during the Blitz.

A lasting remnant of the London Blitz.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A memorial to a dog that inspired rioting in the streets of London.

This peeling mural of Adam and Eve was inspired by the greenhouses at Kew Gardens.

A bronze sculpture of last Sikh maharaja of the Punjab, outside the English estate where he once lived.

This 15th-century fortification was built to defend bunnies.

A mysterious crater-like pond has a spooky tendency to empty and fill with complete disregard to rainfall patterns.

These steps were uniquely crafted so Bishop Richard Fox could travel between his home and town.

A former Victorian swimming pool is now a tranquil and secluded park.

This restored pump house gives a glimpse into the past when communal water supplies were common.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

The ruins of a 12th-century Cistercian monastery can be found alongside World War II tank traps and pillboxes.

This place is the subject of local legends about a good witch and a Celtic God.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Spain's largest bullring offers a unique glimpse at architecture and history.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

A former smithy turned cultural hub with the capital's largest mural space.

Famous for his giant trolls, Thomas Dambo's lesser-known early work is a creative 3D mural with sustainable birdhouses.