Ever played with Russian nesting dolls? Well picture the beloved dolls, in geological form, and you've got Vulcan Point in the Philippines: an island in a lake on an island in a lake on an island.
Vulcan Point is inside Main Crater Lake, which is on Volcano Island, which is in Lake Taal, which is on the Filipino island of Luzon. The point is one of the cones of Taal Volcano, which happens to be the world's largest volcano in a lake. It's been called one of the world's "most fascinating geological oddities" and it's a popular tourist destination because of the amazing views.