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

A quiet memorial to those who died saving others in the heart of the City of London.

This luxury shopping lane has been protected by its own tiny police force for over a century.

The undercroft is a spectacular example of medieval Cistercian architecture.

This extremely remote border crossing was closed to prevent smuggling and looting.

A mysterious medieval monument said to mark the final resting place of Robin Hood’s henchman.

The unusual stilted beacon is the town's only active lighthouse.

A copy of the brutal decapitation device that predated the French Guillotine by about 200 years.

Four-story slides send people whizzing through the math department at this Munich university.

This house was largely built out of hundreds of thousands of discarded glass embalming fluid bottles.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

The Andean town where every single building is decorated with a brightly colored frieze.

Where beer lovers can literally immerse themselves in beer.

Restaurant in Northern Wisconsin comes with a unique feature: a grassy roof covered in living goats.

A slightly surreal menagerie of structures that were lovingly spared from demolition and reconstructed in a field.

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

These particularly resplendent rodents are the state animal of Maharashtra.

The highest tides in the world come in and out here twice a day, allowing you to essentially walk along the ocean floor.

An emerald-green grotto just a short trip from Austin.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

This beautiful example of Victorian engineering is the oldest water-balanced funicular anywhere in the world.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

The skeletal white beams stand as a monument to religious dissent.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.