Colosseum is one of Historical.

1. Colosseum

Piazza del Colosseo (Via dei Fori Imperiali), Rome, Latium
Historic Site · Celio · 1795 tips and reviews

MLe B.MLe B: The line is very long, buy your tickets up on Palentino Hill in the back entrance

2. Sistine Chapel

(Sacellum Sixtinum)
Viale Vaticano, Vatican
Church · Città del Vaticano · 391 tips and reviews

MLe B.MLe B: It can be very crowed but it is open late one night a week (until 10PM) in the summer, this is the best time to go, more manageable less crowded.

3. Fountain of the Four Rivers

(Fontana dei Quattro Fiumi)
Piazza Navona, Rome, Latium
Fountain · Parione · 109 tips and reviews

MLe B.MLe B: Absolutely stunning.. It is also very energetic in the night and the water is lit up and glowing very beautiful less heat fewer people.

St. Peter's Basilica is one of Historical.

4. St. Peter's Basilica

(Basilica Sancti Petri)
Piazza San Pietro, Vatican
Church · Città del Vaticano · 631 tips and reviews

MLe B.MLe B: Gorgeous! If you want to see everything up lose go and stay for mass, but if you stay you can't leave until the end.. Incredible experience

Portico d'Ottavia is one of Historical.

5. Portico d'Ottavia

Via del Portico d'Ottavia, Rome, Latium
Historic Site · 17 tips and reviews

MLe B.MLe B: Currently under construction but can still see outside.

Catacombe di Domitilla is one of Historical.

6. Catacombe di Domitilla

Via delle Sette Chiese, 282, Rome, Latium
Monument / Landmark · Ardeatino · 11 tips and reviews

MLe B.MLe B: I went here on a tour with Dark Rome Wonders and it was very informative from information about frescos, dirt, construction otherwise I would have wondered around not knowing what I was looking at.

Cimitero dei Cappuccini is one of Historical.

7. Cimitero dei Cappuccini

Via Vittorio Veneto 27, Rome, Latium
Museum · Colonna · 38 tips and reviews

MLe B.MLe B: Great place, I saw this with Dark Rome Wonders tour and it was very informative, also has a very nice art museum attached to it. Right next to metro and taxi stand.

8. Spanish Steps

(Scalinata di Trinità dei Monti)
Piazza Trinità dei Monti 17 (Piazza di Spagna), Rome, Latium
Historic Site · 287 tips and reviews

MLe B.MLe B: Currently being cleaned so the entire area is shut off.

9. Keats-Shelley Memorial House

Piazza di Spagna, 26, Rome, Latium
Museum · Colonna · 12 tips and reviews

MLe B.MLe B: Very nice place, cost of entry 5 euro. They show 3 films, have a fantastic gift shop, and much of the home is original.

Pantheon is one of Historical.

10. Pantheon

Piazza della Rotonda (Via Palombella), Rome, Latium
Monument / Landmark · 789 tips and reviews

MLe B.MLe B: Beautiful! No fee for tickets, but make sure there isn't a mass going on, they may have the public leave early. It is now a church. At night when it is closed it is also very energetic with people

11. United States Holocaust Memorial Museum

100 Raoul Wallenberg Pl SW, Washington, D.C.
History Museum · Southwest Washington · 258 tips and reviews

MLe B.MLe B: Go early, or right when it opens, the memorial room is so powerful when it's empty