Colossal

Where: Rome, Italy
When: June 2011

Some facts you may or may not know about the Colosseum in Rome: It had 80 arches on every level; more than 5.2 million people visited the place in 2012 -- more than the Pompei excavations, the Uffizi gallery and Sant'Angelo Castle combined; much of the original material used to build the ampitheater exists in other buildings throughout Rome; and the building was used for about 450 years, or roughly the same amount of time it took to build the new Wembley.

  

UFO over Slovakia

Where: Bratislava, Slovakia
When: August 2013

This is, officially, the world's shortest tower. Dubbed the "UFO" by the World Federation of Great Towers, it is part of the Most SNP, the bridge in Bratislava that's named after the Slovak National Uprising against the Germans in World War II. The bridge is the seventh-largest cable-stayed bridge in the world and has access for walkers and cyclists as well as cars. The UFO part of the bridge also has a restaurant and, for those who apparently feel safe standing on top of a UFO 95 meters above the ground without fear having the wind sweep you away and dump you into the Danube, an observation deck.

Summer on the Vltava

Where: Prague, Czech Republic
When: July 2014

Exactly what the title says. That's the Charles Bridge in the background on the left; some clubs, restaurants and a theater in the center and on the right. The smaller of the two spired towers in the middle is the start of the Charles Bridge (or the end if you started in Mala Strana).

The rising

Where: New York City, USA
When: June 2013

One World Trade Center, aka the Freedom Tower, at a not-so-coincidental height of 1,776 feet.

The (dual) height of power

Where: Budapest, Hungary
When: May 2014

You are looking at the sun setting on St. Stephen's Basilica, one of the two tallest buildings in Budapest. The other is the Hungarian Parliament, which like this church is 96 meters at its tallest point. This is not a coincidence -- law dictates that no other buildings in Budapest can be taller, and the buildings' matching heights is meant to show equal importance between the spiritual and lawmaking world. St. Stephen's features, among other things, a bell that weighs roughly 10 tons, 242 sculptures, and the mummified right hand of St. Stephen.