The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

The world's brightest bioluminescent bay.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

Japanese national treasure originally built in 593 CE.

Peace Park and the Atomic Bomb Dome.

Blowtorches, tuna, and a jolly, chain-smoking proprietor mark this beloved street-food stand.

New Zealand's only running funicular railway.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

Open-air museum with an elaborate sculpture garden, stretching for over 70,000 square-meters.

One of the largest Buddhist stupas in the world keeps an eye out in every direction.

Sacred Buddhist home of some spiritual monkeys.

This elegant neoclassical garden is a peaceful oasis in the middle of the Nepalese capital.

Many Hindus make the long pilgrimage to this holy city to have their remains burned on the banks of the Ganges River.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

The world's second-largest sundial, made entirely out of stone.

A colorful square marks the heart of the city's LGBTQ community.

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.