This grubby wall is said to be one of the Earth's esoteric energy centers.

Real bones which are said to have belonged to a Polish dragon.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A monument to the man who almost killed Hitler.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Quite simply the largest tree in the world (by volume).

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

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

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

These ancient sacred grounds granted amnesty to those who managed to reach them.

A controversial memorial at the place where Captain Cook met his violent end.

The center of the only hemisphere that awards visitors with a commemorative coin.

As its grandiose name implies, this wooden dome is unsurpassed in size.

A comedy troupe's collection of bizarre humor.