A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This magnificent Cincinnati graveyard is also a popular public park.

Cemetery featuring rare glass-fronted columbarium.

A railway bridge leading nowhere stands lonely in the middle of a meadow.

The second-longest continuous wall on the planet protects a hidden secret in the deserts of India.

An out-of-the-way state park in Oregon that features both a picturesque waterfall and the ruins of a hydropower plant.

A spectacular overlook of the Little Grand Canyon of the San Rafael River, a deep sandstone gorge streaked with orange, red and white in a remote, uncrowded part of Utah.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

This once-popular otherworldly landscape was formed by one of the largest volcanic eruptions in history.

A open air theatre built on a cliff by an eccentric British woman.

The island houses the ruins of a secret nuclear fusion lab that once employed high-profile Nazi scientists

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.