A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Survival capsules find a second life as a unique hotel.

Explore the subjective dream of a hotel.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

This massive and unusual rock formation near Okotoks is the world's largest known glacial erratic.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A mecca for India's Jains.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A unique opportunity to stay the night in retrofitted sections of sewer pipe.

An enormous, 30-story-deep hole in the middle of Guatemala City.

Hut with supplies for shipwreck survivors.

The remains of a hospital ravaged by fire, once a progressive place of innovations for disabled children.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Hundreds of tiny dead butterfly eyes gaze down at diners in this Australian eatery.

The celebrated eyesore created by starry-eyed sweethearts.

A charming flea market shop dedicated to retrofuturistic apparati.

Statue of death tucked in the University of Medicine courtyard.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.