Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

Babe Ruth and others planted saplings for a 1930s tourism campaign. The saplings grew as the area faded.

These gardens celebrate the biological and cultural diversity of the Hawai‘ian Islands.

One of Hawaiʻi’s most notable historic petroglyph fields lies within a major resort.

An ode to one of the first concerts broadcast via satellite.

An authentic replica of an Asian temple and garden hidden amongst the natural beauty of Hawai'i.

This legendary urban waterfall creates a dazzling display of rainbows.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Locals pay their respects at a shrine to soccer player Diego Maradona—which claims to contain a real lock of his hair.

This medieval city gate is now a blend of the past and the modern world.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

This 17th-century passageway is home to numerous bookshops, a witch legend, and the oldest pizzeria in the world.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

The remains of the left arm of the levitating philosopher-saint are kept in a 13th-century Neapolitan basilica.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

The walls and streets of the ancient city are peppered with penises.

Erotic art covers the walls of the largest ancient pleasure palace.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

Ancient snack bar of the Roman Empire re-opened.