This secluded walkway overlooks a magnificently wild London green space.

The remains of Crystal Palace Great Exhibition of 1851.

An incarceration museum on the spot of possibly the oldest prison in England.

Catacombs turned marketplace.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A castle built by an eccentric medieval enthusiast in rural Ohio.

The 25th President's marble casket can be visited in this classical Ohio tomb.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

This bridge was constructed from the remains of the first Ferris wheel.

This former office building has been transformed into an immersive music venue and art space.

This former Indiana quarry has been transformed into a park and SCUBA site where divers can explore the drowned mining equipment.

Tombstones carved to look like tree trunks are used for multiple generations of family members.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

An easily overlooked stretch of ornate window fronts and gaslight lamps that could be right from the pages of Dickens.